CE certificate golden painted case, snap on window. gauge for welding and cutting use 50mm,63mm, gauge, used for co2 and argon gasgolden painted case, snap on window.gauge for welding and cutting userange: 0-6000psi.thread: 1/4, NPT.BSP.BSPT. size: 50mm, 60mmgolden painted case, snap on window.low mount connection