... , SCM420, SCM440, SNCM439, SNCM220; SACM645 USA Standard: SAE4140, SAE4130, SAE9840, SAE4340, AISI4145H, SAE4150, SAE8620, Europe Standard: 42CrMo4, 25CrMo4, 34CrNiMo6, 39CrNiMo3, 17NiCrMo6, 18CrNiMo7 ... ; Also can supply the finish products according the drawings4.Length: 3 meters or 4 meters and up or fix ... length according the actually needs 5.high quality and service ...