Plunger Seal and Back Up Ring Back Catalog number: 11-4126 Manufacturer: SCIENCIX Availability: In the manufacturer's stock Price on request - + Recommended CTS-11119-02 Head Plunger Seal, 2/pk Price on request CTS-21183 Peristaltic Pump Price on request CTS-10692 HPMV Gold Seals, 2/pk Price on request