1. High precision involute gear for industrial machinery 2. Precision can reach DIN 4/ AGMA 13 3. Gear modulus: 3 mm - 50 mm MaterialAlloy Steel, Casting Steel, Gray cast iron, Ductile Iron, WeldmentModulus3mm-50mmAccuracyDIN Class 4, ISO/GB Class 4, AGMA Class 13, JIS Class 0StandardDIN, ISO/GB, AGMA, JISNo. of teethmore than 12Heat treatmentQuenching and tempering, gear teeth induction ...