Description:Bike Headset Expander with Top Caps Plug made from aluminium alloy, durable, antioxidant and durable for prolonged use.Expanding range: 22.2-25.4mm and fits for 25.4mm-28.6mm/1''-1-1/8" front fork.Eliminating the risk of damage and providing additional support to the fragile top edge of the fork. Can firmly connect the front fork and the stem.Easy installation and don't need to hammering into; need to work with 6mm Allen hex wrenchPerfect tools to help you replace your old broken piece bicycle, useful accessories for MTB, mountain bike, road bike, folding bike, etc.Specification:Material: aluminium alloySize: length - 28mm/1.10inch, 40mm/1.57inchExpanding Range: 22.2-25.4mmFit for 25.4-28.6mm/1''-1-1/8" front forksPackage Includes:(2 Pack)1 Piece Headset Expanderor1 Piece Headset Expander1 Piece Headset Top Caps1 Piece Screw