... layers like optical filter, reduce anti-reflective film on viewing window or spectrum element that applied to optical instruments ... red, yellow, green and blue on optics lens, electronics, acrylic, glass, lamps, mobile viewing window, glasses, lighting. Parameter SpecificationModel GXW ... valveElectric Gun Electric gun 4 round shaped crucibles and a U shaped crucible, high voltage 4KV-8KV adjustable. ...