Cartridge Check Valve Housing, 2/pk Back Catalog number: CTS-A11431-02 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-1010T O-Ring, TFE Price on request 11-3883 Needle Assembly Price on request CTS-10711 Alliance Head Plunger Seal Kit, Black, 2/pk Price on request