Rotor Seal, 6 port, Rear Back Catalog number: CTS-21164 Availability: In the manufacturer's stock Price on request - + Recommended CTS-A11342 Tube Assembly, Transducer to Check Valve Price on request CTS-11371 ACQUITY I2V BSM Performance Maintenance Kit Price on request CTS-2962 Plunger Seal, Gold Price on request