Everbilt 5 in. Red Polyurethane and Steel Swivel Plate Caster with Locking Brake and 330 lbs. Load Rating 4120945EB - The Home Depot
4 Inch Caster Wheels with Brake, Heavy Duty Casters Set of 4 2000lbs, Swivel Plate Casters with Double Ball Bearings, Industrial Caster Wheels for Cart,Furniture,Workbench,Trolley(Two Hardware Kits) - Yahoo Shopping
RWM, Face, For 6 in Wheel Dia., Caster Brake Kit - 29XU59|46-0620-ICWB KIT - Grainger
3-1/2" Bakery Rack Oven Casters, Set of 4 (Two Brakes) - Mapp Caster
5" Commercial Grade Light Duty Tool Box Caster Kit - 2 Brake and 2 Rig - Caster Central