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-0620 Outlet Check Valve Cartridge Price on request CTS-A125 Inlet Check Valve Assembly Price on request 11-4052 Needle Seal, SIL-30AC, SIL-30ACMP Price on request