●HIGH QUALITY: Made of high quality aluminum alloy, the seat post clamp is durable for long term use ●EASY INSTALLATION: Simple design makes it easy to install and use ●Compatibility: 28.6mm seatpost clamp applies to 25.4mm seatpost, and it is suitable for any style bike ●MULTI CHOICE: There are several colors for you to choose, you can get what you want ●Specifications: Material: Aluminum alloy; Optional Color: Black, Silver; Size: Approx. 2.6 x 1.9 inches (65 x 48 mm); Inner Diameter: Approx. 1.1 inches (28.6 mm); Weight: Approx. 1.4 oz (41 g)