Piston, Ceramic Back Catalog number: CTS-21219 Availability: In the manufacturer's stock Price on request - + Recommended CTS-10396 Washer Thermo/Dionex™ Model: P1000, P2000, P4000 Price on request CTS-5464 Clip Ring, Plunger Retainer Price on request CTS-0038 Tube, Right Inlet Pigtail Price on request