Body Material: FCD550.
Spool Material: SKD11 (Hardened and tempered to HRc56 or more).
Material: SUS440C (Hardened and tempered to HRc55-60).
Material: SUS440C (Hardened and tempered to HRc55-60).
Body Material: FCD450,500.
Spool Material: SCM415 (Carburized and hardened to HRa82-84).
Body Material: SCM435 (Carburized and hardened to HB269-321).
Nozzle Tip: (High-frequency hardened to Hv550 or more).