Uxcell a15101900ux0740 1.2" Diameter Plastic Wheel Metal Top Plate Swivel Ball Bearing Casters 4 Pcs (Pack of 4) Package Content: 4pcs x Caster Wheel; Product Name: Caster Wheel; Weight: 114g Material: Metal, Plastic; Features: Swivel Main Color: Black; Wheel Size: (Approx.)30mm/1.2"(D)