1.Our 50mm diameter  brass  rods  are  made  of solid  brass,not  iron  or aluminum rods wrapped around brass.
2.While  other  manufacturers  use  brass  for  the  flexible  connection,we use  pure  copper.Pure  copper  has  better  conductivity,while  brass  has poor conductivity and flexibility.
3.This bronze copper plate contains alloy components.Ordinary brass is relatively brittle,while this alloy copper has high strength.
4.Chromium-zirconium copper is a special material for copper electrode heads,with  a  higher  hardness  than  pure  copper.Some  manufacturers use pure copper instead of chromium-zirconium copper.
5.Solenoid valves and cylinders use Taiwan AirTAC.