Check Valve Cartridge, 2/pk Back Catalog number: CTS-A094 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10323 Sapphire Plunger Price on request CTS-20612 Plunger Seal, Black Price on request CTS-10761 HPMV 1 & 2 Rebuild Kit w/Spool Price on request