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-11315 Needle Seal, PEEK™ SIL-20 Price on request 11-1596 Piston Assembly, Sapphire Price on request CTS-5746 Reference Valve Rebuild Kit Price on request