MATERIAL - mtb stem is made of 6061 aluminum alloy, light weight, high strength, corrosion resistance, no deformation SIZE - handlebar diameter: 31.8mm; fork diameter: 28.6mm; center distance between the two holes: 90/110mm ADJUSTABLE - The angle of the bike stem is adjustable from 0 degrees to 60 degrees, you can adjust the angle that suits you and make your ride more comfortable. 6mm; Center distance between two holes: 90/110mm Adjustable - The angle of the stem is adjustable from 0 to 60 degrees, you can adjust the angle that suits your needs, making your ride more comfortable Easy to install - just connect the original fork and handlebar, adjust the angle, and then tighten the stem bolts Application - Adjustable stem is suitable for most of the bikes, such as BMX, DH, MTB, road bikes and so on. Application - Adjustable stem is suitable for most bikes such as BMX, DH, MTB, road bikes, etc. Please check your handlebar and fork size before purchase and choose the right model accordingly: 1 pc.