The Kalloy Laprade 350mm Seatpost is made out of aluminum with incremental adjusting clamp.6061-T6 aluminum with incremental adjusting clampItem SpecificationsColorSilverWeight350gLength350mmMaterialAluminumSeatpost Diameter25.4mmOffset20mmMinimum Height35mmMax Height255mmSeatpost TypeRigidClamp StyleStd RailsDefined ColorSilver