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Continue to ChatASCO 35500149 - Joinable subbase + 1 Flange With Instant Fittings for Tube 4mm OD + Locking Screw, Series 355 JOUCOMATIC https://www.valves-direct.com/product/asco-35500149-joinable-subbase-1-flange-with-instant-fittings-for-tube-4mm-od-locking-screw-series-355-joucomatic/