Black Plunger Seal Back Catalog number: CTS-6613 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-4150 Tubing D-R Assembly Price on request CTS-5531-07 Solvent Bottle Filter, 7/pk Price on request CTS-A11431-02 Cartridge Check Valve Housing, 2/pk Price on request