Waxman Titan 10 in. Pneumatic Plate Caster, Swivel, 350 lb. Capacity, 4130155TD at Tractor Supply Co.
Caster, Pneumatic 6"x 2" Wheel, Swivel at BuyCasters.com, Your Caster, Wheel and Material Handling Experts
8" Pneumatic Swivel Caster
Amazon.com: XtremepowerUS 8" Pneumatic Caster Set of (4) Large Size Tire Heavy Duty 2-Swivel / 2 - Rigid -Silver : Industrial & Scientific
HAMILTON Plate Caster with Pneumatic Wheels: 8 in Wheel Dia., 330 lb, 10 5/8 in Mounting Ht - 36T702|R-7008-PRB - Grainger
14" Dual Wheel Pneumatic Swivel Caster
CasterHQ 8" x 2.5" Swivel Set of 4 Pneumatic Caster - 4 PLY - 250 LBS PER / 1000 LBS PER Set Capacity - Air Filled - Commercial/Industrial Application - 8 inch - Shock Absorption -: Amazon.com: Industrial & Scientific
16x4 HEAVY DUTY PNEUMATIC SWIVEL CASTER - Allied Caster
Hamilton S-72166-pr Dual Wheel Swivel Pneumatic Casters 4" W for sale online | eBay
Shepherd 10 in. Black Rubber and Steel Pneumatic Swivel Plate Caster with 350 lb. Load Rating 9796 - The Home Depot