Shepherd 10 in. Black Rubber and Steel Pneumatic Swivel Plate Caster with 350 lb. Load Rating 9796 - The Home Depot
8" Pneumatic Swivel Caster
6PPNTR 6" Rigid Pneumatic Wheel
Hamilton Dual Wheel Rigid Pneumatic Casters, 16 in R-72166-PR | Zoro
CasterHQ 10" x 3.5" Swivel of 4 Set Pneumatic Caster - 4 PLY - 350 LBS PER 1400 LBS PER Set Capacity - Air Filled - Commercial/Industrial Application 10 inch x 3.5 inch Shock Absorption: Amazon.com: Industrial & Scientific
SNAP-LOC Air-Ride 6 in. Pneumatic Swivel Plate Caster with 300 lbs. Load Rating SLAC6ARS - The Home Depot
Waxman 12 in. 450 lb. Capacity Titan Pneumatic Plate Caster, Swivel, 4142955TD at Tractor Supply Co.
6610W Series 10 Pneumatic Rigid Caster (Black) - TrioPines
12" Pneumatic Caster Set of 4 - 2 Swivel with Bolt-On Swivel Lock/2 Swivel with Brakes - Black Rubber Wheel - 1,800 lbs. Capacity - Service Caster Brand - Walmart.com