... material Aluminum, Carbon steel, Stainless steel,Brass, Titanium alloy,Tungsten steel ,POM, etc .Surface treatmentPolishing, Powder ... Preferred Industriesa) Communication Equipmentsb) Medical Equipmentsc) Ship accessories d) Electronic hardware accessoriese) Mechanical Equipmentsf) Other ... . pneumatic actuator ball valve , pneumatic actuator ball valve aluminum alloy pneumatic control valve accessories