Needle Seat Back Catalog number: 11-2570 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A11095 Check Valve, Double Ball & Seat Price on request CTS-11119-02 Head Plunger Seal, 2/pk Price on request CTS-2294-04 Plunger Seals, 4/pk Price on request