Check Valve, Cartridge Back Catalog number: CTS-21480 Availability: In the manufacturer's stock Price on request - + Recommended 11-2525 1/4" Short Comp. Screw (Gold-Plated), 10/pk Price on request CTS-11265 Kit S200 Standard Pump Seals Price on request CTS-A11095-02 UPLC Check Valve, Double Ball & Seat, 2/pk Price on request