This product has five specifications, which is convenient for you to adjust the handlebar to the height and angle suitable for you, and it is more comfortable to ride. Features: Aluminum alloy material is solid and practical. The frosted surface is comfortable and smooth without hurting hands. Can be adjusted by 60(plus and minus) to release the waist pressure. There is a height suitable for you. Double screw design, high stability, not easy to fall off, firmer, safer riding. Convenient and easy to install. Specifications: Size: 31.8*90mm, 31.8*110mm, 31.8*130mm, 25.4*90mm, 25.4*110mm (optional) Color: black Material: aluminum alloy Front fork diameter: 28.6mm Handlebar diameter: 31.8*90mm, 31.8*110mm, 31.8*130mm: 31.8mm 25.4*90mm, 25.4*110mm: 25.4mm Package size: 31.8*90mm: 140 * 55 * 45mm / 5.5 * 2.2 * 1.8in 31.8*110mm: 150 * 50 * 45mm / 5.9 * 2.0 * 1.8in 31.8*130mm: 180 * 50 * 45mm / 7.1 * 2.0 * 1.8in 25.4*90mm: 140 * 50 * 45mm / 5.5 * 2.0 * 1.8in 25.4*110mm: 150 * 50 * 45mm / 5.9 * 2.0 * 1.8in Package weight: 31.8*90mm: 307g / 10.8ounce 31.8*110mm: 324g / 11.4ounce 31.8*130mm: 341g / 12.0ounce 25.4*90mm: 296g / 10.4ounce 25.4*110mm: 315g / 11.1ounce Packing List: 1 * Bike Handlebar Riser