PTFE Diaphragm, 2/pk Back Catalog number: 11-2891 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-5464 Clip Ring, Plunger Retainer Price on request CTS-10711 Alliance Head Plunger Seal Kit, Black, 2/pk Price on request CTS-10772 Pump Seals, Low Pressure Price on request