PRESSURE REGULATOR dual gauges,black steel and explosion-proof case, black bezel,glass window(250bar,6bar) with CE certif PRESSURE REGULATORdual gauges,black steel and explosion-proof case, black bezel,glass window(250bar,6bar)with CE certificateall brass main bodyapplicable gas: acetyleneinlet connection: W21.8*1/14 (or as your requirements,lilke CGA-320,G5/8,BSPT, NPT,etc.)outlet connection: G1 ...