Needle Seat Back Catalog number: 11-2570 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-2587 Piston Seal Wash Seal/Priming Valve Seal Price on request CTS-10340 Plunger Seal Price on request CTS-A11095-02 UPLC Check Valve, Double Ball & Seat, 2/pk Price on request