AAGUT Caster Wheels, 3 Inch Rubber Heavy Duty 1/2"-13 x 1-1/2" Threaded Stem Castors, Locking Brake Swivel Wheel, Replacement for Carts Dolly Workbench Trolley, Set of 4: Amazon.com: Industrial & Scientific
4 X Heavy Duty 100mm Rubber Swivel Castor Wheels Trolley Caster Brake 600KG Cyan 714367574950 | eBay
Industrial Nylon PP Rubber Heavy Duty Trolley Wheels - China PP Casters and PU Casters
Amazon.com: GBL 2" Heavy Duty Caster Wheels with 2 Brakes + Screws - up to 880Lbs - Set of 4 No Floor Marks Silent Castor Wheels for Furniture - Rubbered Trolley or
Medical trolley wheel - L51T-4 - Xinchen Caster Wheels - for hospital bed / for stretcher / for wheelchair