Rotor Seal, 6 port, Rear Back Catalog number: CTS-21164 Availability: In the manufacturer's stock Price on request - + Recommended 11-4181 Seal Wash (0.0787 ID, Fixed), 2/pk Price on request CTS-10694 Plunger Seal Price on request CTS-A11094-02 UPLC Primary Check Valve Assy, 2/pk Price on request