Reverse Components Bolt Seatpost Clamp Lightweight Aluminum Clamp If you have a bicycle, chances are your bike has a seatpost clamp. An easy way to add a splash of color to your bike is to upgrade the clamp. The Reverse Components Bolt Seatpost Clamp is made from machined 7075 aluminum and has a 5mm steel bolt. It is available in different colors and weighs in at about 26g. Features Made from 7075 machined aluminum Comes with a 5mm steel bolt Approximate weight: 26g | Reverse Components | Bolt Seatpost Clamp | Black | 31. 8Mm