... steel; 2.Wire Dia.:0.01mm -65mm, or as client's request3.Surface Treatment:Zinc plating;Nickel ,Tin plating;Chrome plating;Powder coating; ... Our company havs the high tech engineering staff,advanced producting line;We can make many kinds of springs: Spiral spirngs ... springs, Battery springs,compression springs,suspension spring,clutch spring,Wire-Formed spring;Flat spirng,..etc.We are committed to ...