4 in

Gray Thermoplastic Rubber Swivel Plate Caster, 300 lb capacity, locking, reliable braking with soft, quiet performance, Made in the USA

Commonly used on heavy utility carts, mobile storage systems, and workbenches that need to be moved frequently and then secured in place during use

Well-suited for workshops, warehouses, and backroom environments where quiet operation and floor-friendly movement are important during daily handling

Also i for large DIY builds or commercial fixtures that require stable positioning and smooth mobility across hard indoor surfaces