Set of 4 Enclosure Casters Non Locking Black
By Belkin

Four heavy-duty casters are made to use with all Belkin 42U Enclosures. ... 

RK1004 Enclosure Casters
By Belkin

Cabinet Caster - Color: Black - Silver - Packaged Quantity: 4 - Compatibility: Belkin RK1004 Enclosure - Load Capacity: 1500lb per Caster - Application/Usage: Cabinet - Additional Information: 2 Locking, 2 Non-locking Casters - Standard Warranty: Lifetime Limited - - ... 

Heavey Duty Rack Caster-Kit for Rack CAB
By StarTech.com

This set of four casters connects to the bottom of our RK series Server Equipment Racks, allowing you to move and adjust the position of your rack/cabinet to suit your needs. While specifically designed for the StarTech RK Series of Server racks and cabinets, these casters will fit many other racks with their universal hole pattern for mounting screws. ... 

APC SymMetra LX Castor Kit- Left Front, Right Rear
By APC

High performance, redundant power protection with scalable power and runtime for space-constrained server rooms, and voice and data networks. ... 

APC SymMetra LX Castor Kit- Right Front, Left Rear
By APC

High performance, redundant power protection with scalable power and runtime for space-constrained server rooms, and voice and data networks. ...