PM Kit, 1290 Binary Pump Back Catalog number: CTS-21421 Availability: In the manufacturer's stock Price on request - + Recommended CTS-21480 Check Valve, Cartridge Price on request CTS-21164 Rotor Seal, 6 port, Rear Price on request CTS-10560 Seal Wash Plunger Seal, Alliance, 2/pk Price on request