This Paddle Clamp is used to install on your paddle to finish paddle length adjustment. After setting down desired paddle length,you can fasten the clamp with the lock. Features: Made of premium plastic material,strong and durable. Pop-up button/Fastener lock to easily install on your paddle(not included). Suitable for most SUP paddle shaft. Good replacement for you. Specification: Type: A / B (optional) A size: 70 * 40 mm / 2.8 * 1.6 in B size: 67 * 45 mm / 2.6 * 1.8 in Top inner diameter: 27 mm / 1.1 in Bottom diameter: 30 mm / 1.2 in Material: Plastic Weight: approx. 33.1 g / 1.2 oz Package List: 1* Paddle Clamp (Not Includes Paddle) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.