Plunger Seal and Back Up Ring Back Catalog number: 11-4126 Manufacturer: SCIENCIX Availability: In the manufacturer's stock Price on request - + Recommended CTS-5559 Priming Syringe Needle Price on request 11-2891 PTFE Diaphragm, 2/pk Price on request CTS-21463 Check Valve Cartridge, Ceramic, 2/pk Price on request