Sapphire Plunger Back Catalog number: CTS-10475-1 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21463 Check Valve Cartridge, Ceramic, 2/pk Price on request CTS-12016 Compression Screw, 1/16", SS, 10/pk Price on request CTS-5313 Compression Screw, SS Price on request