Material:Aluminum alloy Color:black Net weight:20g Use this seatpost shim sleeve,you can use 25.4mm seatpost on your 27.2mm bike seatpost. Size: 25.4mm to 27.2mm 25.4mm to 28.6mm 25.4mm to 31.6mm 27.2mm to 28.6mm 27.2mm to 30.0mm 27.2mm to 30.4mm 27.2mm to 30.8mm 27.2mm to 31.6mm 27.2mm to 33.9mm 31.6mm to 33.9mm Package included: 1 piece seatpost shim
