Product Description:Name:Spur GearModule: 4Number Of Teeth:10T-23TMaterial: 45# carbon steelGear thickness: 35mmShape: flat without stepsTooth pitch: 12.56mmTooth depth: 9mmBore Diameter: The inner gap is a craft hole (hair embryo hole), and the hole diameter will be assorted for different batches.The records is for reference only, please be successful in kind!Remark: If you've special needs, please touch us, we will customize it in line with your needs!Package Included:According on your choice!