Specifications: Disc is made of good quality material, durable to use. CNC machining integrated, intensity is more secure, apply for long time cycling. Narrow wide tooth design ensures max chain retention, increases wear life, and reduces friction and noise. The narrow wide tooth design make you no longer worried about the chain dropped, easy to pass through the bumpy road. Type: Bike Chainring Material: Aluminum Alloy Number Of Teeth: 44T/46T/48T Attributes: Style A: 44T, Style B: 46T, Style C: 48T Features: Durable, Stable, Easy to Use Style A: Diameter: 183mm/7.2" (Approx.) Style B: Diameter: 193mm/7.6" (Approx.) Style C: Diameter: 200mm/7.87" (Approx.) Disc Thickness: 4mm/0.16", Positive Tooth Thickness: 3.5mm/0.14", Negative Tooth Thickness: 1.9mm/0.07", Screw Hole Diameter: 75mm/2.95" (Approx.) Notes: The sprocket BCD is 104, and the purchaser carefully determines that his crank is 104BCD (the diameter of the circle formed by the center points of the four disc nail holes is 104 mm), don't make a mistake, or it will fail to install. 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 Chainring (Screw Not included)