ULTIMATE USE Duro Aluminium Seat PostThe Duro Aluminium Seat Post from ULTIMATE USE is designed to offer outstanding strength, durability and most importantly a very low weight. It's able to meet these needs through the use of computer aided design. It's also suitable for both hard off-road mountain bike use and long-distance road use.Features: Material: Aluminium Layback: 10mm Designed for standard 7x7mm saddle rails Suitable for MTB or road useBuy ULTIMATE USE Components from Chain Reaction Cycles, the World's Largest Online Bike Store.