Features: [ALUMINUM ALLOY MATERIAL]: Seatpost clamp, made of high quality aluminum alloy, which is durable and rustproof. [SPECIALLY DESIGNED FOR]: Seat post clamp inner diameter is 28.6mm, it fit for out diameter 25.4mm bike seat tube. [EASY TO INSTALLATION]: Seatpost clamp, it is easy to install and use, it is no need any tool to install, and make adjusting seatpost height a breeze. [AVAILABLE COLORS]: Black or silver, several colors for you to choose and you can choose according to your own needs. [WIDE APPLICATION]: Bike seat post clamps of Ergonomic design, more comfortable and efficient seatpost clamps are being loved by more cyclists. Bike quick release seatclamp is suitable for road bike,MTB, folding bike and so on. Specification: Item Type: Seatpost Clamp Material: Aluminum Alloy Optional Color: Black, Silver Size: Approx. 65 x 48mm / 2.6 x 1.9inch Inner Diameter Approx. 28.6mm / 1.1inch Weight: Approx. 41g / 1.4oz Package List: 1 x Seatpost Clamp