Seal, GFP, High Pressure, Piston Back Catalog number: 11-1601 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21219 Piston, Ceramic Price on request CTS-A11431-02 Cartridge Check Valve Housing, 2/pk Price on request CTS-10396 Washer Thermo/Dionex™ Model: P1000, P2000, P4000 Price on request