TheHope QR Seat Clamp is a quick release seat clamp, machined from billet T6 aluminium. Hope QR Seat Clamp Features Universal collar can be easily swapped from bolt to QR (Quick Release) Machined from billet T6 aluminium Sizes 28.6, 30, 31.8, 34.9, 36.4 and 38.5mm diameters More info