Features 1、Main Features: Fine processing and fine tuning of the screw design make the clamp lock the seat post tightly without hurting the seat post itself, allowing the frame and the seat tube to fit more closely, and the force is more direct. 2、Aluminum Alloy and CNC Treatment: The seat tube clamp is made of aluminum alloy full CNC parts, which is very lightweight and will not burden the bicycle. 3、Easy to Install and Remove: Reasonable design makes the seatpost clamp easy to install and disassemble, which is convenient to use. 4、Application: This seatpost collar is suitable for Dahon, for Fnhon folding bicycles with aluminum frames (steel frames are not applicable). 5、Suitable Size: The seat post clamp has a diameter of 41mm / 1.6in, which is suitable for most folding bikes with a seat tube diameter of 33.9mm / 1.3in. Item Type: Bike Seat Post Clamp Material: Aluminum Alloy Diameter: Approx. 41mm / 1.6in Product Weight: Approx. 35g / 1.2oz Application: Suitable for most folding bikes with a seat tube diameter of 33.9mm / 1.3in Package List 1 x Seat Post Clamp