PTFE Stopcock Valve, 2-way, one 1/4" male luer port and one 1/4" male NPT port, 0.046 orifice. PTFE Valve used with NPT fittings. Various ends available (male and female NPT, luer, 1/4" tube and 1/4"-28 UNF). IPS PTFE stopcocks made of virgin PTFE. Compression ferrules made of virgin PTFE. Nuts and ferrule-gripper are made of PVDF.