KCNC"s mountain quick release seat collar features a unique bushingless spherical cam. This system ensures consistently smooth and powerful closure, as well as long product life. The clamp is manufactured from high quality 7075 aluminum with a titanium shaft, and machined in a way that optimizes weight reduction without sacrificing strength or aesthetic.Brand: KCNC Model: QR MTB Clamp Size: 31.8 mm Color: Black Material: 7075 AL with 64 Titanium axle Included in Box: Seatpost clamp x 1 Warranty: 1 Year Products Warranty Weight: 23 grams (0.05 Lbs or 0.81 ounces) Specifications: