Specification:Name: three Mod Spur Gear With Step KeywayMaterial: 45# steelSurface Treatment: High frequency quenching of teethTeeth: 14 Teeth ~ 18 TeethTeeth Pitch: 9.42mmBore: 12/14/15/16/18/20/22/24/25mmTeeth Height: 30mmTotal Height: 48mmShaft Hole: Machining completedTooth Surface Hardness: Hardened teeth surfacePackage:Packing : Plastic bag / Carton box.Quantity : According to your Choose!