... Stainless steel and Titanium),metal punch, colding rolling precision tube(tolerance for inner and outer diameter can be controlled ... machining, Al,Zinc alloy die casting, hardware welding, tube bending, water heater accessories, solar energy equipment accessories,anto parts,etc.Your drawings will ... no rust, no lead(Pb), no pollution to water, no harm to water, no harm to body, creating a health life ...