6 Inches Heavy Duty Rubber Caster Wheels Anti-Skid Swivel Casters Wheels with 360 Degree for Set of 4 (2 with Brakes& 2 Without): Amazon.com: Industrial & Scientific
4-Pack of 6" Flat Free Casters (2 Swivel and 2 Fixed): Amazon.com: Industrial & Scientific
6X2 Heavy Duty Rubber Caster, Load Capacity: 500kg-1000kg
IvyH Backpack Trolley,Wheeled Trolley Aluminium Foldable Hand Cart 6 Wheels Hand Truck for Schoolbag Luggage,Blue - Walmart.com
Rubber Wheel - 6inch Rubber Caster Wheel Manufacturer from Pune
6×2 Red PU Swivel Caster Wheels With Cover - YTCASTER
6 in. Rubber Rigid Caster
Trolley Wheel, Heavy Duty Solid Polyurethane Trolley Industrial Caster Wheel, 6 Inch Caster Wheel with Polyurethane, Swivel Caster with PU Wheel - China Industrial Caster Wheel, Caster Wheel with Polyurethane | Made-in-China.com
Source Industrial caster wheels polyurethane heavy duty swivel trolley wheels 6 inch on m.alibaba.com
ST3060 30x60 Steel Deck Six Wheel Heavy Duty Platform Carts | Premier Carts