Sapphire Plunger w/Holder Back Catalog number: 11-3795 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21463 Check Valve Cartridge, Ceramic, 2/pk Price on request CTS-2294-04 Plunger Seals, 4/pk Price on request CTS-11091 ACQUITY BSM Performance Maintenance Kit Price on request