HDX 4-Piece Heavy Duty 4" 600lb Swivel Casters Wheels w Bumpers 2 Brakes 1" Post | eBay
HDX 4 in. Industrial Casters with Bumper (4-Pack) 30260PS-YOW - The Home Depot
HDX 4 in. Industrial Casters with Bumper (4-Pack) 30260PS-2 - The Home Depot
Amazon.com: Houseables Caster Wheels, Casters, Set of 4, 3 Inch, (Screw Diameter 3/8"-16, Length 1.5"), Rubber, Heavy Duty, Threaded Stem Mount Industrial Castors, Locking Metal Swivel Wheel, for Furniture, Cart : Industrial
Amazon.com: Hlyluoyi Wheels for Shelves Heavy Duty, 3" Caster Wheel for Wire Shelving, Stems 1/4" - 20 x 1" Thread Shelf Caster, 1/4-20 Casters Set of 4, Stem Caster Wheels for 3/4”
Amazon.com: Houseables Caster Wheels, Casters, Set of 4, 3 Inch, (Screw Diameter 3/8"-16, Length 1.5"), Rubber, Heavy Duty, Threaded Stem Mount Industrial Castors, Locking Metal Swivel Wheel, for Furniture, Cart : Industrial