PTFE Diaphragm, 2/pk Back Catalog number: 11-2891 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21585 PM Kit, 1220 Price on request 11-2525 1/4" Short Comp. Screw (Gold-Plated), 10/pk Price on request CTS-10584 Ceramic Plunger Assembly Price on request