Wire Parts - 5" Locking Swivel Caster
Rubber is the more economical option, but doesn't hold as much weight as polyurethane. Stems work with any 1" diameter posts.
Replace damaged or worn out casters on your mobile wire shelving units with these 5" Locking Swivel Caster. Locking mechanism provides additional safety and security. Casters are easy to attach. Item # 205-AC5L. BuyRack.com offers a wide range of accessories for wire shelving systems.