Needle Seat Assembly, 0.12mm ID Back Catalog number: 11-3889 Availability: In the manufacturer's stock Price on request - + Recommended CTS-10476 Sapphire Plunger, Alliance Price on request CTS-A11095-02 UPLC Check Valve, Double Ball & Seat, 2/pk Price on request CTS-21243 1/16'' Ferrule set, 2/pk Price on request