Hollow design makes it add no pressure or weight to your bike. Premium aluminium alloy material brings high strength and wear resistance.Heat treatment process makes it anti corrosion and heat resistant. You can use the stem to achieve a more comfortable riding position.Made of high quality aluminum alloy material, it is durable.We have different styles for you to choose.It is suitable for downhill vehicle, mountain bike.Item Name: Bike StemMaterial: 6061 Aluminum AlloyAngle: Plus Or Minus 7 DegreesFeatures: Lightweight, High-Strength, HollowSize Details: Height: 4cm/1.57" (Approx.)Front Fork Diameter: 2.86cm/1.13" (Approx.)Suitable Handlebar Diameter: 3.18cm/1.25" (Approx.)Style A Size: 3.18cm x 6cm/1.25" x 2.36" (Approx.)Style B Size: 3.18cm x 7cm/1.25" x 2.76" (Approx.)Style C Size: 3.18cm x 8cm/1.25" x 3.15" (Approx.)Style D Size: 3.18cm x 9cm/1.25" x 3.54" (Approx.)Style E Size: 3.18cm x 10cm/1.25" x 3.94" (Approx.)Style F Size: 3.18cm x 11cm/1.25" x 4.33" (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 Bike Stem