Brand New Hope Bolt On Seat Seatpost Clamp - All Colors and Sizes. Full manufacturer's warranty. Please note: The size of the seat clamp is NOT the same size of your seatpost. It will always be larger. Measure the outside diameter of the seat tube at the area where the seat clamp clamps onto to get the correct measurement. Item Specifications: Dependable seat clamps available as a bolt or QR option, different clamp diameters and an ergonomic design. Machined from billet 2014 T6 aluminiumBolt compatible collarsUniversal collarSize 28.6, 30, 31.8, 34.9, 36.4 and 38.5mm diameterAvailable in black, silver, bronze, red, blue, purple and orangeMaterial 2014 T6 Aluminium and BrassWeight from 20g Free shipping within US. International bidders please see shipping details. Payment is due within 48 hours after the auction closes (Ebay regulation). An Unpaid Item case will be filed after that. 30 DAYS MONEY BACK GUARANTEE on qualified items. Please see Return Policy for details. If you have any questions please feel free to ask. Thank you. Don't forget to check out our other cycling related items at a discount price!