Features: 1) Material: 42CrMo, 20CrMnMo, 20Cr2Ni4, 35CrMo, 20CrMnTi and other high intensity alloy steel 2) Tooth flank carburization and nitrification, with rigidity of HRC58-62 3) Gear precision: Grade VI 4) Size:diameters from 5-500mm,module 2.5 up 12.5 5) Can machine gear wheels according to customers' drawings and raw materials 6)Packing: wooden cases or as customers' requirements