Pump Seal, Black Back Catalog number: CTS-10394 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-5464 Clip Ring, Plunger Retainer Price on request CTS-10396 Washer Thermo/Dionex™ Model: P1000, P2000, P4000 Price on request CTS-1010T O-Ring, TFE Price on request