M8x29mm Threaded Rubber Swivel Stem Casters Wheel Black Blue 2pcs Main Material: Stem Caster Wheel; Package Content: 2 x Stem Caster Wheel Product Name: Stem Caster Wheel; Weight: 272g Features: Swivel; Main Color: Black, Blue, Silver Tone Overall Size: 93 x 30 x 85mm/ 3.7" x 1.2" x 3.3" (L*W*H); Wheel Size: 40 x 20mm/ 1.6" x 0.8"(D*T) Thread Size: 8 x 29mm/ 0.3" x 1.1"(D*L); Material: Plastic, Metal