Giant contact slr seatpost features an ultra light single piece moulded full composite construction for a compliant ride with an interchangeable clamp design for 7mm alloy or 9mm carbon saddle railsfeaturesultra light 40205g41 single piece moulded full composite construction309 x 375mm diameter lengthinterchangeable clamp design to allow for 7mm 40alloy41 or 9mm 40composite41 saddle railsextra long lower saddle rail guide designed to cradle lightweight saddle rails securel