Material: aluminum alloy Model: short stem Angle: 7 degrees Installation diameter: 28.6*31.8mm Applicable models: bikes; road bikes Product weight: 35mm(85g); 45mm(95g); 55mm(105g); 65mm(113g); 70mm(120g); 80mm(125g); 90mm(130g); 100mm(135g); 110mm(145g) Product size: 31.8*35/45/55/70/80/90/100/110*28.6mm   Reminder: We are here to serve you wholeheartedly. If you have any purchase questions, customer service will answer you online.   Specifications: 1. Anodizing: Anodizing will generate an oxide film on surface of aluminum, which has a good texture, and can more effectively the aluminum alloy body, anti-corrosion and anti-rust. 2. Sandblasting process: fine sandblasting and fine grain texture, long-term use will not fade, wear-resistant and non-slip. 3. Rugged and durable: 3D forged alloy is used, which is lighter in weight, solid and reliable, and resistant to pressure and deformation. 4. Light weight: Super light and convenient, effective balance, and will not burden the . 5. Professional design: CNC cutting technology, increase the connection force of the pipe, dampen the shock during riding, and make the control more flexible. Package Included: bike stem*1