Brand: DECKAS Material: Aluminum Alloy BCD: 110 mm Mounting Type: 5 Arm Type: Single (narrow and wide teeth) Shape: Round Teeth: 36/38/40/42/44/46/48/50/52T Thickness: 4 mm Colour: Black/Red (as picture) Surface treatment: Anodize Process: High precision CNC Weight: 40g/32t, 50g/34t, 60g/36t,70g/38t Fit Bike Type: Road Bike Compatible with: 7 to 12 speed chain Suitable for: Shimano FC4700,FC-5800,FC-6800,FC-9000 Notes: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Specifications: Durable, Easy to Install, Replacement. Integrated CNC machining, the intensity is safer, apply for long-lasting cycling. Made of aluminum alloy, it is light and strong, not easy to bend and deform.