MODEL "P1", SINGLE STAGE PRESSURE REDUCING REGULATOR 1/4" SIZE, CV=0.02; BRASS BODY, 6061 AL SPRING CHAMBER; 302 SST W/TEFZEL RING DIAPHRAGM,PCTFE SEAT,316L SST SEAT RETAINER,316L SST POPPET,INCONEL X-750 POPPET SPRING,PORT CONFIGURATION "L"; FNPT END CONNECTION; 5-500 PSIG RANGE SPRING; NO OUTLET GAUGE; NO INLET GAUGE; OPT-56: SPECIAL CLEAN PER SPEC #S-1542;