The Kalloy Laprade 400mm Seatpost is made with 6061-T6 aluminum with incremental adjusting clamp.6061-T6 aluminum with incremental adjusting clampItem SpecificationsColorBlackWeight376gLength400mmMaterialAluminumSeatpost Diameter29.2mmOffset20mmMinimum Height35mmMax Height305mmSeatpost TypeRigidClamp StyleStd RailsDefined ColorBlack