O-Ring, PTFE Back Catalog number: CTS-00230-02 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-1599 Check Valve Assembly, Outlet Price on request 11-2525 1/4" Short Comp. Screw (Gold-Plated), 10/pk Price on request 11-3897 Plunger Holder Price on request