As height extender to handlebar for comfortable riding; Made of aluminum alloy, -structured, solid and ; Wide use to fit carbon, alloy and steel forks; Concealed mount to combine both practical & aesthetic features; Comes with 1 types ( 55mm) to meet personal preference. Light weight, quick and easy install. Applicable: Fork riser outer Dia. 28.5mm, Inner Dia. 23.3mm Fits: Carbon fiber, aluminum alloy or steel pipes Screw Hole: M5, M5 bolts can be directly engaged ( not included) Tool: mount with M6 Hex key (Tool not included) Colour:black+silver Material:aluminum alloy Size:160 x 23mm Package Contents: 1 x bike tool Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.