Product Description: Product Name: Chain Drive SprocketModel: 06BTooth pitch: 9.525mmMaterial: forty five # steelFixing method: NO screw holeTooth floor treatment: enamel surface quenching Tooth:9T-24T Process hole:8-14mm(Different batches may result in different inner holes) Note: Due to different batches of products, the general dimensions could be changed, please consult with the genuine object!Remarks: If you have special needs, please touch us, we can customise according to your needs! Package Include: According in your Choose!