OUTERDO Bike Fork Stem Extender Bicycle Handlebar Riser Adaptor New MTB Aluminium Alloy Head up Adapter Flexible Easy Installation Material: Aluminium alloy,T4 + T6 heat treatment, 4.9 ultrahigh strength Handling more flexible, light weight, easier to force when climbing, operation is comfortable The product equip with 4 gaskets,1 x 10mm and 3 x 5mm, can increase the height up to 70mm Can freely adjust the gasket to fit your own height Easy installation, just connect up the original front fork stem