The 34.9mm Bicycle Double Bolt Seat Clamp is designed for easy installation and adjustment. Its user-friendly design allows for quick and convenient setup, making it an for both beginners and experienced cyclists. Upgrade your bike with this reliable and stylish seat clamp, and enjoy secure and comfortable ride. Features -Color:Black -Material:Aluminium -Size:5.00X4.20X2.50cm/1.97X1.65X0.98in -Secure attachment: the dualbolt mechanism ensures a tight the seat post, preventing any unwanted movement or loosening during cycling. -Versatile fit: designed to fit 39mm seat posts, this clamp is suitable for various bike models, offering flexibility in installation. -Enhanced clamping power: the dualscrew design increases the clamping force, ensuring the seat post remains firmly in place for a safer ride. -Modern look: the sandblasted black color adds a modern and to your bike, enhancing its overall visual appeal. - durability: constructed from durable aluminum, this clamp is resistant to damage and wear, ensuring a prolonged lifespan. Package list: 2 x bicycle seat tube clamp