Piston Assembly, Sapphire Back Catalog number: 11-1596 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-3601 ACQUITY H SM-FTN Performance Main. Kit,700005236 n Price on request CTS-10493 Check Valve Cartridge, 2/pk Price on request CTS-21012 Compression Screws & Ferrules, 1/16", SS, 5/pk Price on request