The Elite Set Back Thomson Seatpost has a post and cradle which are machined from one piece of 7000 aluminum.Post and cradle are machined from one piece of 7000 aluminum41mm seat rail grip length16mm (5/8") set backItem SpecificationsColorBlackWeight230gLength367mmMaterialAluminumSeatpost Diameter30.9mmOffset16mmMinimum Height100mmMax Height265mmSeatpost TypeRigidClamp StyleStd RailsDefined ColorBlack