Shop Commercial Milkshake Machine for Sale

Sponsored
About our ads
$1,529.00
Hamilton Beach HMD400R-CE Triple Spindle Drink Mixer - 220/240V (International Use Only)
WebstaurantStore
2
22% off
$1,529.00
Hamilton Beach HMD400R-CE Triple Spindle Drink Mixer - 220/240V (International Use Only)
WebstaurantStore
2
$999.00
$2,118.00
Hamilton Beach HMD400R Triple Spindle Drink Mixer - 120V
WebstaurantStore
53
52% off
$999.00
$2,118.00
Hamilton Beach HMD400R Triple Spindle Drink Mixer - 120V
WebstaurantStore
53
$999.00
Waring WDM360TX Triple Spindle Three Speed Drink Mixer With Timer - 120V, 1125W
WebstaurantStore
109
55% off
$999.00
Waring WDM360TX Triple Spindle Three Speed Drink Mixer With Timer - 120V, 1125W
WebstaurantStore
109
$322.90
VEVOR Milkshake Maker 375W X 2 Electric Milkshake Machine Commercial Double Heads Drink Mixer Blender Led Intelligent Microswitch 3-Speed Milkshake
VEVOR
16
$322.90
VEVOR Milkshake Maker 375W X 2 Electric Milkshake Machine Commercial Double Heads Drink Mixer Blender Led Intelligent Microswitch 3-Speed Milkshake
VEVOR
16
$459.90
VEVOR Milkshake Maker 375W X 3 Electric Milkshake Machine Commercial Triple Heads Drink Mixer Blender Led Intelligent Microswitch 3-Speed Milkshake
VEVOR
16
$459.90
VEVOR Milkshake Maker 375W X 3 Electric Milkshake Machine Commercial Triple Heads Drink Mixer Blender Led Intelligent Microswitch 3-Speed Milkshake
VEVOR
16
$282.90
VEVOR Milkshake Maker 375W X 3 Electric Milkshake Machine Triple Heads Drink Mixer Blender Machine 3-Speed Milkshake Mixer With 3 X 820 Ml Stainless
VEVOR
16
$282.90
VEVOR Milkshake Maker 375W X 3 Electric Milkshake Machine Triple Heads Drink Mixer Blender Machine 3-Speed Milkshake Mixer With 3 X 820 Ml Stainless
VEVOR
16
$3,189.50
Elmeco FC3 Millennium Granita / Frozen Drink Slush Machine
First Class Beverage
Free shipping
$3,189.50
Elmeco FC3 Millennium Granita / Frozen Drink Slush Machine
First Class Beverage
Free shipping
$689.00
$884.00
Waring Commercial WDM240TX Heavy-Duty Double Spindle Drink Mixer, Each Spindle Has Independent 1Hp Motor, With Countdown Timer, Digital Display,
Amazon.com
111
Free shipping
22% off
$689.00
$884.00
Waring Commercial WDM240TX Heavy-Duty Double Spindle Drink Mixer, Each Spindle Has Independent 1Hp Motor, With Countdown Timer, Digital Display,
Amazon.com
111
$776.00
Waring Commercial 7011HS 2-Speed Food Blender With Stainless Steel Container And Heavy-Duty Motor, 32-Ounce,Silver
Amazon.com
7
Free shipping
$776.00
Waring Commercial 7011HS 2-Speed Food Blender With Stainless Steel Container And Heavy-Duty Motor, 32-Ounce,Silver
Amazon.com
7
$2,444.00
Elmeco FC2 Millennium Granita / Frozen Drink Slush Machine
First Class Beverage
$2,444.00
Elmeco FC2 Millennium Granita / Frozen Drink Slush Machine
First Class Beverage
$253.99
VEVOR Milkshake Maker, 375W X 3 Electric Milkshake Machine, Triple Heads Drink Mixer Blender Machine, 3-Speed Milkshake Mixer With 3 X 820 Ml
Amazon.com
8
Free shipping
$253.99
VEVOR Milkshake Maker, 375W X 3 Electric Milkshake Machine, Triple Heads Drink Mixer Blender Machine, 3-Speed Milkshake Mixer With 3 X 820 Ml
Amazon.com
8
$427.21
$520.99
375W Triple Head Milkshake Maker, Commercial Drink Mixer With 3-Speed Control, LED Intelligent Switch
Home Depot
Free shipping
18% off
$427.21
$520.99
375W Triple Head Milkshake Maker, Commercial Drink Mixer With 3-Speed Control, LED Intelligent Switch
Home Depot
Free shipping
$7,760.70
Stoelting E112X-302 - Frozen Beverage/Shake Machine, Counte
JES Restaurant Equipment
Free shipping
$7,760.70
Stoelting E112X-302 - Frozen Beverage/Shake Machine, Counte
JES Restaurant Equipment
Free shipping
$13,153.80
Stoelting E122-38I2 - Frozen Beverage/Shake Machine, Counte
JES Restaurant Equipment
Free shipping
$13,153.80
Stoelting E122-38I2 - Frozen Beverage/Shake Machine, Counte
JES Restaurant Equipment
Free shipping
$347.00
$389.89
VEVOR 3-Speed 375 W X 2 Milkshake Maker LED Intelligent Microswitch 1.73-Quart Commercial/Residential Bowl-Lift Stand Mixer Stainless Steel One_Size
Lowe's
11% off
$347.00
$389.89
VEVOR 3-Speed 375 W X 2 Milkshake Maker LED Intelligent Microswitch 1.73-Quart Commercial/Residential Bowl-Lift Stand Mixer Stainless Steel One_Size
Lowe's
$106.83
$131.89
VEVOR 2 Speeds 180 W X 2 Milkshake Maker 2 X 800 ML SUS Cups 0.84-Quart Commercial/Residential Tilt-Head Stand Mixer Stainless Steel
Lowe's
19% off
$106.83
$131.89
VEVOR 2 Speeds 180 W X 2 Milkshake Maker 2 X 800 ML SUS Cups 0.84-Quart Commercial/Residential Tilt-Head Stand Mixer Stainless Steel
Lowe's
$148.39
$211.99
120 W Electric Milkshake Maker, Stainless Steel Commercial Milk Tea Shaker, Silver
Home Depot
Free shipping
30% off
$148.39
$211.99
120 W Electric Milkshake Maker, Stainless Steel Commercial Milk Tea Shaker, Silver
Home Depot
Free shipping
$9.69
$52.99
Milkshake Electric Commercial Milk Drink Mixer Shake Machine Stainless Steel
us.freshbottleshop
81% off
$9.69
$52.99
Milkshake Electric Commercial Milk Drink Mixer Shake Machine Stainless Steel
us.freshbottleshop
$21.49
$75.00
110V Commercial Stainless Steel Milk Shake Machine Double Head Drink Mixer
palacecoup
71% off
$21.49
$75.00
110V Commercial Stainless Steel Milk Shake Machine Double Head Drink Mixer
palacecoup
$113.15
$137.99
375 W Commercial Milkshake Maker, Single Head Mixer Blender Machine, 3-Speed, 820 Ml Stainless Steel Cup, Grey
Home Depot
Free shipping
18% off
$113.15
$137.99
375 W Commercial Milkshake Maker, Single Head Mixer Blender Machine, 3-Speed, 820 Ml Stainless Steel Cup, Grey
Home Depot
Free shipping
$23,494.00
Saniserv 614SAS, Select-A-Shake Commercial Milkshake Machine, (1) 20 Quart
GoFoodservice
Free shipping
$23,494.00
Saniserv 614SAS, Select-A-Shake Commercial Milkshake Machine, (1) 20 Quart
GoFoodservice
Free shipping
$15.49
$55.99
Commercial Electric Milkshake Maker Drink Mixer Blender Milk Shake Machine 110V
palacecoup
72% off
$15.49
$55.99
Commercial Electric Milkshake Maker Drink Mixer Blender Milk Shake Machine 110V
palacecoup
$1,133.00
Hamilton Beach HMD400 3-Speed Triple Spindle Drink Mixer
Restaurant Equippers
6
$1,133.00
Hamilton Beach HMD400 3-Speed Triple Spindle Drink Mixer
Restaurant Equippers
6
$15,831.00
Saniserv 691, Commercial Milkshake Machine, (2) 14 Quart
GoFoodservice
Free shipping
$15,831.00
Saniserv 691, Commercial Milkshake Machine, (2) 14 Quart
GoFoodservice
Free shipping
$129.97
Commercial Milkshake Machine Stainless Steel Drink Mixer 650Ml | Inspire Essentials
Inspire Uplift
Free shipping
$129.97
Commercial Milkshake Machine Stainless Steel Drink Mixer 650Ml | Inspire Essentials
Inspire Uplift
Free shipping
$22.69
$109.00
Commercial Milkshake Machine Maker Ice Cream Mixer Smoothie Frappe Double Head
hotelbaltpark
79% off
$22.69
$109.00
Commercial Milkshake Machine Maker Ice Cream Mixer Smoothie Frappe Double Head
hotelbaltpark
$25.69
$132.00
Commercial Milkshake Machine Maker Ice Cream Mixer Smoothie Blender Double Heads Milk Shaker
hotelbaltpark
80% off
$25.69
$132.00
Commercial Milkshake Machine Maker Ice Cream Mixer Smoothie Blender Double Heads Milk Shaker
hotelbaltpark
$54.99
Nostalgia 2-Speed Milkshake Maker
Beauty Boutique Catalog
5K+
$54.99
Nostalgia 2-Speed Milkshake Maker
Beauty Boutique Catalog
5K+
$109.10
Commercial Double Heads Milkshake Machine Maker Ice Cream Mixer
eBay
$109.10
Commercial Double Heads Milkshake Machine Maker Ice Cream Mixer
eBay
$26.49
$109.00
Wuzstar Electric Milkshake Maker Commercial Milk Shaker Machine Smoothie Mixer Stainless Steel 18000RMP
ricugui
75% off
$26.49
$109.00
Wuzstar Electric Milkshake Maker Commercial Milk Shaker Machine Smoothie Mixer Stainless Steel 18000RMP
ricugui
$90.99
$113.00
Everythings.Life 180W Commercial Milkshake Machine - 18000RPM Stainless Steel Drink Mixer 650Ml, US 110V / United States
Shop
19% off
$90.99
$113.00
Everythings.Life 180W Commercial Milkshake Machine - 18000RPM Stainless Steel Drink Mixer 650Ml, US 110V / United States
Shop
$11,250.00
Saniserv 608, Commercial Milkshake Machine, (1) 20 Quart
GoFoodservice
1
Free shipping
$11,250.00
Saniserv 608, Commercial Milkshake Machine, (1) 20 Quart
GoFoodservice
1
$189.99
$239.99
Vevor 0.85Qt. Electric Milkshake Machine Drink Mixer
eBay
Free shipping
20% off
$189.99
$239.99
Vevor 0.85Qt. Electric Milkshake Machine Drink Mixer
eBay
Free shipping
$22.69
$109.00
Commercial Milkshake Machine Maker Ice Cream Mixer Smoothie Frappe Double Head
ricugui
79% off
$22.69
$109.00
Commercial Milkshake Machine Maker Ice Cream Mixer Smoothie Frappe Double Head
ricugui
$189.97
$379.94
180W Stainless Steel Electric Milkshake Maker, Double Head Commercial Shake Machine With 800Ml Cup | Tools, Home & Hobby
Inspire Uplift
Free shipping
50% off
$189.97
$379.94
180W Stainless Steel Electric Milkshake Maker, Double Head Commercial Shake Machine With 800Ml Cup | Tools, Home & Hobby
Inspire Uplift
Free shipping
$11.99
$49.90
Stainless Steel Milk Shaking Machine, Electric Drink Mixer, Heavy-Duty Drink Mixer With Double Head, Commercial Restaurant-Quality Retro Milkshake Maker
streamerrank
75% off
$11.99
$49.90
Stainless Steel Milk Shaking Machine, Electric Drink Mixer, Heavy-Duty Drink Mixer With Double Head, Commercial Restaurant-Quality Retro Milkshake Maker
streamerrank
Commercial Milkshake Machine 180W Heavy Duty Stainless Steel Drink Mixer with 650ml Cup, Dual-Disc Blender Shake Maker for Coffee/Milk Tea, Non-Slip Base & 2-Speed Control for Restaurant/Cafe
0:32
Commercial Milkshake Machine 180W Heavy Duty Stainless Steel Drink Mixer with 650ml Cup, Dual-Disc Blender Shake Maker for Coffee/Milk Tea, Non-Slip Base & 2-Speed Control for Restaurant/Cafe
50 viewsNov 1, 2024
amazon
Commercial 2X10L Hopper Milkshake Machine/Ice Slush Machine/Margarita Frozen Drink Machine/Cooling Beverage Making Machine/Frozen Beverage Slushie Machine
0:44
Commercial 2X10L Hopper Milkshake Machine/Ice Slush Machine/Margarita Frozen Drink Machine/Cooling Beverage Making Machine/Frozen Beverage Slushie Machine
1 viewsDec 25, 2021
amazon
VEVOR 110V Frozen Yogurt Blending Machine 750W, Yogurt Milkshake Ice Cream Mixing Machine 304 Stainless Steel Construction, Professional Commercial Kitchen Equipment | VEVOR US
VEVOR 110V Frozen Yogurt Blending Machine 750W, Yogurt Milkshake Ice Cream Mixing Machine 304 Stainless Steel Construction, Professional Commercial Kitchen Equipment | VEVOR US
Jul 8, 2024
vevor.com
Roband Milkshake Makers DM31 & Cups | Industry Kitchens
Roband Milkshake Makers DM31 & Cups | Industry Kitchens
Feb 21, 2020
industrykitchens.com.au
Commercial Electric Milkshake Maker, Double Head Milkshake Machine, Cocktail Tea Drink Mixer Smoothie Malt Blender, Milk Shake Maker Mixer for Kitchen Coffee Cooking Baking, 18000RMP Speed
0:32
Commercial Electric Milkshake Maker, Double Head Milkshake Machine, Cocktail Tea Drink Mixer Smoothie Malt Blender, Milk Shake Maker Mixer for Kitchen Coffee Cooking Baking, 18000RMP Speed
Feb 17, 2024
amazon
Gdrasuya10 Commercial Milk Shaking Machine, Stainless Steel Double Heads Electric Silent Milk Shake Machine with 800ml Cup 18000RMP High Speed for Drink Mixer 110V
0:28
Gdrasuya10 Commercial Milk Shaking Machine, Stainless Steel Double Heads Electric Silent Milk Shake Machine with 800ml Cup 18000RMP High Speed for Drink Mixer 110V
Oct 27, 2020
amazon
650ML Milkshake Machine Electric Milk Shakers 180W Commercial Milkshake Machine 18000rpm Milkshake Maker Machine Single Head Drink Mixer Stainless Steel Milk Shaker Maker Mixer Smoothie Milk
0:32
650ML Milkshake Machine Electric Milk Shakers 180W Commercial Milkshake Machine 18000rpm Milkshake Maker Machine Single Head Drink Mixer Stainless Steel Milk Shaker Maker Mixer Smoothie Milk
Jan 16, 2024
amazon
1:32
Kolice Full Automatic Commercial Ice Cream Blending Machine, Milkshake Maker, Ice Cream Mixer, Frozen Yogurt Ice Cream Blender-750W, 2 Cups And 2 Shaping Nozzle, Timer Control
1 viewsApr 4, 2021
amazon
CS700 Milkshake Machine
Aug 23, 2018
sentryequipment.net
0:57
Kolice Commercial Milkshake Machine, Ice Cream Blending Machine, Gelato Ice Cream Mixing Machine, 2 cups and 2 shaping nozzle, auto cleaning
Jun 21, 2018
amazon
1:34
Milkshake Machine Buying Guide
8.6K viewsSep 2, 2015
YouTubeWebstaurantStore
Numilk Commercial Machine
11 months ago
numilk.com
0:32
Milkshake Maker 180W Electric Milk Shaking Machine with 800ml/27.05oz Cup, Commercial 2 Speeds Single-Head Milkshake Smoothie Blender Maker w/16000rpm for Commercial and Home
1 views9 months ago
amazon
0:14
Taylor Commercial Milkshake Machine | Fast, Consistent Shakes for QSR & Convenience
382 views2 months ago
YouTubeDSL Canada
8:11
SaniServ - Milkshake Demo
4.3K viewsSep 23, 2019
YouTubeServe Canada
4:03
Top 5 Best Commercial Milkshake Machines [Review in 2025 ]
1.9K viewsMay 1, 2023
YouTubeLaptop Wizard
0:34
MI-N1C High Speed Commercial Milkshake Machine
19.1K viewsSep 26, 2024
YouTubeMixtec
1:17
Milkshake Machine that Makes Multiple Delicious Flavors Easily
39.2K viewsAug 28, 2014
YouTubeSentry Equipment
2:10
Avamix Milkshake Machines
9.6K viewsMar 12, 2021
YouTubeWebstaurantStore
8:48
Best Milkshake Maker Machines 2024 🥤🍦 Indulge in the Ultimate Shake Experience!
6K viewsDec 24, 2023
YouTubeBr8 Future
2:48
Hamilton Beach® Commercial HMD200 & HMD400 - Spindle Milkshake Mixers
23.8K viewsSep 2, 2011
YouTubeChefs' Toys
0:27
Nostalgia Two-Speed Electric Milkshake Maker and Drink Mixer, Includes 16-Ounce Stainless Steel Mixing Cup & Rod, Jade Green
50 viewsMar 17, 2022
amazon
4:22
Milkshake Machine Royal Catering RCMS-PRO | Expert review
25.2K viewsFeb 7, 2019
YouTubeChef's Gear UK
This 19th Century Milkshake Mixer Needs to Make a Comeback
Mar 19, 2023
theawesomer.com
0:32
Watch Commercial Milkshake Maker Milk Shake Machines﹙B08GCJFPJ6﹚ on Amazon Live
Jun 2, 2023
@amazonpijingzhe
0:26
Watch Commercial Milkshake Maker on Amazon Live
Jun 2, 2023
@amazonCgoldenwall Store
2:53
Electro Freeze CS 700 Milkshake Machine Makes Milkshakes Fast
1.2K viewsJul 2, 2024
YouTubeSentry Equipment
4:20
An Unsuccessful Milkshake Machine Sale | The Founder
36.5K viewsOct 24, 2024
YouTubeClip Empire
VEVOR Commercial Ice Cream Machine — Auto Soft Serve Maker
Jan 13, 2025
vevor.com
See more

Shop Commercial Milkshake Machine for Sale

Sponsored
About our ads
$1,529.00
Hamilton Beach HMD400R-CE Triple Spindle Drink Mixer - 220/240V (International Use Only)
WebstaurantStore
2
22% off
$1,529.00
Hamilton Beach HMD400R-CE Triple Spindle Drink Mixer - 220/240V (International Use Only)
WebstaurantStore
2
$999.00
$2,118.00
Hamilton Beach HMD400R Triple Spindle Drink Mixer - 120V
WebstaurantStore
53
52% off
$999.00
$2,118.00
Hamilton Beach HMD400R Triple Spindle Drink Mixer - 120V
WebstaurantStore
53
$999.00
Waring WDM360TX Triple Spindle Three Speed Drink Mixer With Timer - 120V, 1125W
WebstaurantStore
109
55% off
$999.00
Waring WDM360TX Triple Spindle Three Speed Drink Mixer With Timer - 120V, 1125W
WebstaurantStore
109
$322.90
VEVOR Milkshake Maker 375W X 2 Electric Milkshake Machine Commercial Double Heads Drink Mixer Blender Led Intelligent Microswitch 3-Speed Milkshake
VEVOR
16
$322.90
VEVOR Milkshake Maker 375W X 2 Electric Milkshake Machine Commercial Double Heads Drink Mixer Blender Led Intelligent Microswitch 3-Speed Milkshake
VEVOR
16
$459.90
VEVOR Milkshake Maker 375W X 3 Electric Milkshake Machine Commercial Triple Heads Drink Mixer Blender Led Intelligent Microswitch 3-Speed Milkshake
VEVOR
16
$459.90
VEVOR Milkshake Maker 375W X 3 Electric Milkshake Machine Commercial Triple Heads Drink Mixer Blender Led Intelligent Microswitch 3-Speed Milkshake
VEVOR
16
$282.90
VEVOR Milkshake Maker 375W X 3 Electric Milkshake Machine Triple Heads Drink Mixer Blender Machine 3-Speed Milkshake Mixer With 3 X 820 Ml Stainless
VEVOR
16
$282.90
VEVOR Milkshake Maker 375W X 3 Electric Milkshake Machine Triple Heads Drink Mixer Blender Machine 3-Speed Milkshake Mixer With 3 X 820 Ml Stainless
VEVOR
16
$3,189.50
Elmeco FC3 Millennium Granita / Frozen Drink Slush Machine
First Class Beverage
Free shipping
$3,189.50
Elmeco FC3 Millennium Granita / Frozen Drink Slush Machine
First Class Beverage
Free shipping
$689.00
$884.00
Waring Commercial WDM240TX Heavy-Duty Double Spindle Drink Mixer, Each Spindle Has Independent 1Hp Motor, With Countdown Timer, Digital Display,
Amazon.com
111
Free shipping
22% off
$689.00
$884.00
Waring Commercial WDM240TX Heavy-Duty Double Spindle Drink Mixer, Each Spindle Has Independent 1Hp Motor, With Countdown Timer, Digital Display,
Amazon.com
111
$776.00
Waring Commercial 7011HS 2-Speed Food Blender With Stainless Steel Container And Heavy-Duty Motor, 32-Ounce,Silver
Amazon.com
7
Free shipping
$776.00
Waring Commercial 7011HS 2-Speed Food Blender With Stainless Steel Container And Heavy-Duty Motor, 32-Ounce,Silver
Amazon.com
7
$2,444.00
Elmeco FC2 Millennium Granita / Frozen Drink Slush Machine
First Class Beverage
$2,444.00
Elmeco FC2 Millennium Granita / Frozen Drink Slush Machine
First Class Beverage
$253.99
VEVOR Milkshake Maker, 375W X 3 Electric Milkshake Machine, Triple Heads Drink Mixer Blender Machine, 3-Speed Milkshake Mixer With 3 X 820 Ml
Amazon.com
8
Free shipping
$253.99
VEVOR Milkshake Maker, 375W X 3 Electric Milkshake Machine, Triple Heads Drink Mixer Blender Machine, 3-Speed Milkshake Mixer With 3 X 820 Ml
Amazon.com
8
$427.21
$520.99
375W Triple Head Milkshake Maker, Commercial Drink Mixer With 3-Speed Control, LED Intelligent Switch
Home Depot
Free shipping
18% off
$427.21
$520.99
375W Triple Head Milkshake Maker, Commercial Drink Mixer With 3-Speed Control, LED Intelligent Switch
Home Depot
Free shipping
$7,760.70
Stoelting E112X-302 - Frozen Beverage/Shake Machine, Counte
JES Restaurant Equipment
Free shipping
$7,760.70
Stoelting E112X-302 - Frozen Beverage/Shake Machine, Counte
JES Restaurant Equipment
Free shipping
$13,153.80
Stoelting E122-38I2 - Frozen Beverage/Shake Machine, Counte
JES Restaurant Equipment
Free shipping
$13,153.80
Stoelting E122-38I2 - Frozen Beverage/Shake Machine, Counte
JES Restaurant Equipment
Free shipping
$347.00
$389.89
VEVOR 3-Speed 375 W X 2 Milkshake Maker LED Intelligent Microswitch 1.73-Quart Commercial/Residential Bowl-Lift Stand Mixer Stainless Steel One_Size
Lowe's
11% off
$347.00
$389.89
VEVOR 3-Speed 375 W X 2 Milkshake Maker LED Intelligent Microswitch 1.73-Quart Commercial/Residential Bowl-Lift Stand Mixer Stainless Steel One_Size
Lowe's
$106.83
$131.89
VEVOR 2 Speeds 180 W X 2 Milkshake Maker 2 X 800 ML SUS Cups 0.84-Quart Commercial/Residential Tilt-Head Stand Mixer Stainless Steel
Lowe's
19% off
$106.83
$131.89
VEVOR 2 Speeds 180 W X 2 Milkshake Maker 2 X 800 ML SUS Cups 0.84-Quart Commercial/Residential Tilt-Head Stand Mixer Stainless Steel
Lowe's
$148.39
$211.99
120 W Electric Milkshake Maker, Stainless Steel Commercial Milk Tea Shaker, Silver
Home Depot
Free shipping
30% off
$148.39
$211.99
120 W Electric Milkshake Maker, Stainless Steel Commercial Milk Tea Shaker, Silver
Home Depot
Free shipping
$9.69
$52.99
Milkshake Electric Commercial Milk Drink Mixer Shake Machine Stainless Steel
us.freshbottleshop
81% off
$9.69
$52.99
Milkshake Electric Commercial Milk Drink Mixer Shake Machine Stainless Steel
us.freshbottleshop