Because of lightweight design, this product has high strength. The surface is treated with matte process so that the overall hardness and feel are greatly improved. Made of aluminum alloy, it is durable and wear-resistant . There are 8 sizes for you to choose from 60mm/70mm/80mm/90mm/100mm/110mm/120mm/130mm. It is suitable for mountain bikes, road bikes, folding bikes,etc. The suitable front fork diameter is 28.6MM. The suitable caliber of the handlebar is 31.8MM. Stem installation height is 40MM. Item Name: Handlebar Stem Material: Aluminum Alloy Adjusting Angle: 17 Degrees Size Details: 60mm: 9cm x 3.5cm x 3.5cm/3.54 " x1.38" x 1.38" (Approx.) 70mm: 10cm x 3.5cm x 3.5cm/3.94" x1.38" x 1.38" (Approx.) 80mm: 11cm x 3.5cm x 3.5cm/4.33" x1.38" x 1.38" (Approx.) 90mm: 12cm x 3.5cm x 3.5cm/4.72" x1.38" x 1.38" (Approx.) 100mm: 13cm x 3.5cm x 3.5cm/5.12" x1.38" x 1.38" (Approx.) 110mm: 14cm x 3.5cm x 3.5cm/5.51" x1.38" x 1.38" (Approx.) 120mm: 15cm x 3.5cm x 3.5cm/5.91" x1.38" x 1.38" (Approx.) 130mm: 16cm x 3.5cm x 3.5cm/6.30" x1.38" x 1.38" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Handlebar Stem