Product Description:Product Name: Chain Drive SprocketModel: #25 04CTooth pitch: 1/4'' (6.35mm)Material: #45 steelFixing method: One M5 screw holeTooth surface treatment: teeth floor quenchingTooth:46T-60TBore:10mm,12mm,14mm,15mmNote: Due to different batches of products, the final dimensions could be changed, please discuss with the genuine object!Remarks: If you've particular needs, please contact us, we are able to customise in step with your needs!Package Include:According on your Choose!