Carts With Chrome Casters are designed for food service, medical, institutional, laboratory and pharmaceutical equipment. 304 Chrome Plates Steel. Precision ball bearings in wheels for easier rollability. Each caster is a total lock brake model that limits your cart from rolling or twisting. Dual ball swivel raceways for added strength. Wheels have full plastic guards for added protection. Polyurethane TPU thread material. 4" tall caster is 1¼" wide. Three shelf unit will hold 300 lbs. of evenly distributed weight. Type: Storage Accessories Color: Multi-Color