[Sturdy Material]:Bicycle Seatpost Clamp is made of high quality aluminum alloy material,good quality,and wear resistant [Fine Workmanship]:Bike Seatpost Clamp smooth without burrs,and extended arm design,is lightweight and labor saving [Size]:Bicycle quick release seatpost clamp height is 20mm.The seat tube clamp has a bore of 34.9mm,which is suitable for most road and mountain bike frame sizes [Easy Installation]:The aluminum alloy bike seat tube clamp is easy to install and use,no tools are required for installation,and adjusting the height of the seatpost is easy [Widely Used]:The bike seatpost clamp is a great accessory for mountain bike,folding bike,road bike,etc, Weight: 0.0551155655 Pounds, Manufacturer: KIXZSAZ