Bike Alloy Adjustable Handlebar Stem Raiser Fits 1.1/8" Fork Steerers Length: 12cm, Weight: 190g Base Diameter: 1 1/8" (28.6mm) Fork stem diameter: 28.6mm (standard) This stem raiser is design to offer the rider a more comfortable riding position allowing you an extra 0mm-70mm of height adjustment on your handlebar stem. Manufactured from lightweight 6061 alloy and finished with a hard wearing anodising Four spacing washers to customise the stem height and a locking top cap complete the package