Check the listing for details. BOX ONE BMX QUICK RELEASE SEAT POST CLAMP 31.8mm RED/BLACK. Color: RED/BLACK, Condition: New. Listed at 34.99 USD. DescriptionBox One Quick Release Seat Clamps are cold-forged, and CNC machined from 6061-T6 aluminum alloy. A quick-release lever makes adjusting your seat height quick and easy. Weighing just 28 grams/1 ounces in the 31.8 sizes, it’s as lightweight as it is tough. The head of the quick-release lever and the face of the clamp are given a proprietary zero friction” surface treatment that ensures smooth lever action for the life of the clamp without the need for a bushing. Available in 31.8 in anodized Black/Black, Blue/Black, Gun Metal/Gun Metal, Red/Back and Silver/Silver clamps with levers and gold pivots, laser-etched graphics, and titanium hardware. FeaturesLightweight Open FrameConvenient Quick Release Mechanism SpecificationsMaterial 6061-T6 AluminumProcess: Cold-ForgedHardware: TitaniumFinish: Anodized w/Laser-Etched GraphicsSize & Weight: 31.8mm: 27.0 grams / 0.95 ounces