Check Valve Cartridge, 2/pk Back Catalog number: CTS-A094 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-5531-05 Solvent Bottle Filter, 5/pk Price on request 11-4052 Needle Seal, SIL-30AC, SIL-30ACMP Price on request CTS-5746 Reference Valve Rebuild Kit Price on request