!!! NOTE (very important) : This mountin bike mtb stem ONLY fit for 31.8mm handlebar! Other handlebar is NOT applicable！Fit for Handlebar diameter 31.8mm (1.25''), front fork stem diameter 28.6mm (1-1/8"), Length: 90mm (center distance of the two holes). Angle: 35 degree. Help to up or down the heigth of handlebar. ONLY fit for 31.8mm handlebar! Other handlebar is NOT applicable！Please measure the diameter of the handle and confirm the quantity before you buy it! Light weight and durable, weight Only 135g (0.28lb). (The package already contains all the parts. Please don't dismantle/discard any parts after receiving the package, because there are no spare replaceable parts in it.） Constructed of high-strength 6061 T6 aluminum alloy. Suitable for most road bike, mountain bikes, track bike, MTB, BMX, DH, etc.