ACQUITY I-Class SM-FTN Performance Maint. Kit,2890 Back Catalog number: CTS-21240 Availability: In the manufacturer's stock Price on request - + Recommended 11-2570 Needle Seat Price on request CTS-A094 Check Valve Cartridge, 2/pk Price on request CTS-3209 Syringe Seal, 250μL/2500μL Price on request