Inlet Check Valve Cartridge Back Catalog number: CTS-0621 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-11435 Seal, Needle PEEK™ Price on request CTS-10475-1 Sapphire Plunger Price on request CTS-5531-07 Solvent Bottle Filter, 7/pk Price on request