8" x 4" Forged Steel Hd Swivel Caster - Atlanta Caster & Equipment, Inc.
Swivel Caster Wheels for ½" Pipe (4-Pack) — PIPE DECOR
Cast Iron Casters, Heavy Duty 6 Inch Steel Fixed Casters - YTCASTER
Metal Caster - CASTER-4X/5X/6X
Set of 4 All Steel Swivel Plate Caster Wheels with Brakes Locking - Heavy Duty High-Gauge Steel Gray Iron Metal Wheels (3" Combo) - CasterHQ Brand: Amazon.com: Industrial & Scientific