Check Valve Cartridge, 2/pk Back Catalog number: CTS-A094 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-20612 Plunger Seal, Black Price on request CTS-10324S Seal Pack w/Needle Price on request CTS-21012 Compression Screws & Ferrules, 1/16", SS, 5/pk Price on request