The Hope Quick Release Seatpost Clamps are cnc-machined featuring a long QR lever running on a brass brush to enable secure clamping. Weighing only 52 grams, the sizes available are 28.6 31.8, 34.9, and 36.4 MM. Color choices are Black, Blue, Gold, Red, Silver, or Gun Smoke Anodized with a laser etched Hope logo.