Feature:1. Quick Detachable Lock Design: With quick detachable lock design, the clamp can be adjusted on the way without any other tools.2. Simple Operation: Simple to operate, easy to use, easy to install and disassemble.3. Manufacturing Material: Made of high quality aluminum alloy material, it is smooth, lightweight, durable and wear resistant.4. Wide Applicability: In addition, it is suitable for most types of bikes, mountain bikes, road bikes, etc.5. Applicable Seat Tube: The 31.8mm / 1.3in clamp is generally used for 27.2mm / 1.1in and 28.6mm / 1.1in seat tubes, and 34.9mm / 1.4in is generally used for 30.4mm / 1.2in , 30.8mm / 1.2in, 30.9mm / 1.2in and 31.6mm / 1.2in seat tubes.Specification:Item Type: Mountain Bike Seat Pipe ClampWeight: Approx.22g / 0.8ozMaterial: Aluminum AlloyProduct Color: BlackProduct Height: Approx.13.5mm / 0.5in.Package List:1 x Seat Tube Clamp