KLETON Pneumatic Casters, 8"" (203.2 mm), 350 lbs. (158.8 kg.), Pneumatic, Rigid, Steel

Pneumatic CastersFour ply pneumatic casters offer smooth and quiet rolling over the roughest surfaces and outdoor terrainShock absorbing properties give the greatest possible protection to both the load and floorThe ""Air cushion"" feature will transport the most fragile material and instruments without damageNot recommended for floors with metal shavings or corrosive chemicals; Plate Size: 4"" x 4 1/2"" Bolt hole centers: 2 3/4"" x 3 3/8"" Bolt hole size: 13/32""; Surface Applications: Concrete, brick, carpet, steel, tile, asphalt, wood and linoleum ; Note: For optimum use pneumatic wheels must be properly inflated