Outlet Check Valve Back Catalog number: 11-4063 Manufacturer: SCIENCIX Availability: In the manufacturer's stock Price on request - + Recommended 11-3889 Needle Seat Assembly, 0.12mm ID Price on request CTS-21089 Needle Seal (For pH 1-14, for operation up to 130 Price on request CTS-21015 Ferrule, 1/16", SS, 3/pk Price on request