ACQUITY I-Class SM-FTN Performance Maint. Kit,2890 Back Catalog number: CTS-21240 Availability: In the manufacturer's stock Price on request - + Recommended CTS-A125 Inlet Check Valve Assembly Price on request CTS-10340 Plunger Seal Price on request CTS-A11095-02 UPLC Check Valve, Double Ball & Seat, 2/pk Price on request