Itm alcor road seatpostthe itm alcor road seatpost is made from lightweight yet strong 6061 alloy it has a 2 piece clamp head that uses 2 bolts to provide maximum rigidity and security on the saddle rails it also features itm graphics that fit in well with the rest of the alcor 80 line of components features material 6061 alloy weight 284g 27 2mm 289g 30 9mm 297g 31 6gbuy itm components from chain reaction cycles the worlds largest online bike store