1.Use ultralight high-strength aluminium alloy with high quality CNC machined, light weight but high strength. 2.Applicable to single speed vehicles to solve chain tension problems. 3.Adjusts for perfect chain tension. 4.High Wear-resistant and excellent durability 5.Easy adjustment by screw, direct installation. : Net weight: 225 g Size: 205 x 200 x 5MM Spec: mount / ISCG-05/ISCG03 Applicable number of teeth:32T-38T Colour:black Material:Aluminum alloy + nylon Package Contents: 1 * Chain guide Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.