25.4mm Mountain Bike Stem Aluminum Alloy Short Handlebar Stem MTB Bike Handlebar Stem for Most Bicycle Fixed Gear Road Bike MTB. Features: Corrosion Resistant, Highly Durable, Comfortable Grip, Easy Installation, Lightweight Design. Specification: Origin Mainland China, Material Aluminum alloy, Size 45*25.4mm, Installation depth 30mm, Front fork installation 28.6.