Product Description: Product Name: Chain Drive SprocketModel: 35B 06C 3 Points Tooth pitch: 9.525mmMaterial: #45 steelRoller diameter: 50.8mmTooth surface treatment: teeth floor quenchingTooth:10T-25TProcess hole:10mm(Different batches can result in several internal holes.)Note: Due to varied batches of products, the general dimensions will be changed, please talk over with the genuine object!Remarks: If you've particular needs, please contact us, we can customise per your needs! Package Include: According on your Choose!