NITROUS BOTTLE VALVE WITH HIGH FLOW OUTLET FOR FAST NITROUS RACING. HIGH FLOWING LARGE ORIFICE NITROUS VALVE FOR 5#, 10#, 15# AND 20# ALUMINUM NITROUS CYLINDERS, CGA 660 OUTLET - LARGE ORIFICE FOR MOST NITROUS FLOW, 1.125-12UNF2A INLET WITH ORING,1/8" High Pressure Gauge Port, CHROME PLATED BRASS, 3000PSI SAFETY DEVICE Manufactured meeting USA CGA V1, S1.1 and G4.1 Compressed Gas Association Standards for DOT/TC Aluminum Cylinders.