Plunger Seal Back Catalog number: CTS-10694 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10985 600/610 Performance Maintenance Kit Price on request CTS-21011 Cartridge Check Valve System Kit Price on request 11-4134 Rotor Seal & Pod Repair Kit, Vespel, 3-Groove for Price on request