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Cowie® PTFE Stopcock, with Screw-locking systems, for Vacuum(5mmHg)/Pressure(1bar)Good for Chemical·Corrosion Resistance, Grease Free, for Tubing and Hose, <UK-made>, PTFE 밸브/콕크, Screw식 Cowie® PTFE Stopcock, with Screw-locking systems, for Vacuum(5mmHg)/Pressure(1bar)Good for Chemical·Corrosion Resistance, Grease Free, for Tubing and Hose, <UK-made>, PTFE 밸브/콕크, Screw식