Made out of monocoque carbon technology and its semi-internal cable routing design enables the rider and mechanic easier transportation and maintenance. Sirocco 2-pcs integrated stem is engineered to match Sirocco integrated carbon handlebar(RA-550) but it is compatible to any handlebar in which the clamping center is Ø31.8mm in cylindrical shape. Complete your purchase with the Controltech Sirocco Integrated Carbon Handlebar here! Material: Carbon fiber Barbore:Ø31.8mm Stem angle: -8° Stem length: 90/100/110mm Weight: 181g (90mm), 199g (100mm), 207g (110mm) Internal cable routing Optional computer mount: SM-07 Notes:Do note that this product doesn't include Controltech Sirocco Integrated Carbon Handlebar. Buy Controltech Road Stem from New Era Cycle online bike store. The best bike accessories, parts, and components shop.