ACQUITY I-Class SM-FTN Performance Maint. Kit,2890 Back Catalog number: CTS-21240 Availability: In the manufacturer's stock Price on request - + Recommended 11-2891 PTFE Diaphragm, 2/pk Price on request CTS-5313 Compression Screw, SS Price on request CTS-10340 Plunger Seal Price on request