2-1/2"X1-1/4" HARD RUBBER SWIVEL CASTER - Allied Caster
Everbilt 3 in. Black Soft Rubber and Steel Swivel Plate Caster with 175 lbs. Load Rating 49479 - The Home Depot
3" Extra Soft Rubber Caster Wheel - Caster City
Amazon.com: Slipstick CB681 2 Inch Floor Protector Rubber Caster Wheels (Set of 4) 5/16 Inch Stem or Top Plate Mounting Options - Black/Gray Green : Office Products
Amazon.com: 4 Pack 3" Swivel Caster Wheels Rubber Base with Top Plate & Bearing Heavy Duty : Industrial & Scientific