Uxcell a15080700ux0004 8mm Threaded Stem 1.5 Inch Diameter Wheel Chair Swivel Caster 2 Pcs Black (Pack of 2) Main Material: Plastic, Metal; Package Content: 2 x Threaded Stem Caster Wheel Product Name: Threaded Stem Caster Wheel; Weight: 96g Main Color: Black, Silver Tone; Overall Size: 65 x 50 x 40mm/2.6" x 2" x 1.5"(L*W*H)