Check Valve Cartridge, 2/pk Back Catalog number: CTS-10600 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-1596 Piston Assembly, Sapphire Price on request CTS-5531-05 Solvent Bottle Filter, 5/pk Price on request CTS-11080 Alliant Solvent Mgr PM Kit Price on request