Quality Material: This M5x45mm Bike Seat Post Quick Release Pin is made of aluminum alloy, ensuring long-lasting performance and reliability. Size: Bike Seat Clamp with a size of 45mm, it is designed to fit most mountain bikes perfectly, providing a secure and stable hold. Easy Installation: The quick release design allows for easy installation and removal without the need for any additional tools, making it convenient for all users. Package Includes: Each package comes with 1pcs M5x45mm Bike Seat Post Clamp, offering great value for your money. Versatile Use: Ideal for securing the seat post clamp on mountain bikes, this quick release bolt provides an efficient solution to keep your bike in top condition. Specification: Material: Aluminum Alloy Package Includes: 1 Piece Bicycle Seatpost Clamp Note: 1. Please allow slightly error due to manual measurement.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.3. Wish you a wonderful on-line shopping! 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.