MODEL "4381" HIGH PURITY REG. FOOD & PHARM APPLICATION, TFE GASKET 1/2" SIZE; 316L SST BODY & SPRING CHAMBER SPECIAL CLEAN PER CASHCO SPEC #S-1576; SPECIAL TRIM MATERIAL; NPT SCREWED; 5-30 PSIG SST RANGE SPRING; PER SPQ NUMBER 56664 WITH SET TRIM: 316L SST METALLIC PARTS, TFE SEAT, EPDM DIAPHRAGM & TFE DIAPHRAGM COVER; FOR LQUID & GASEOUS APPLICATIONS; WITH (2) DN8 PLUGGED GAUGE PORTS 180 DEG APART; DN15 SIZE NPT END CONNECTIONS; PLASTIC KNOB;