Backup Seal Back Catalog number: CTS-2963 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-2294 Plunger Seal Price on request CTS-21012 Compression Screws & Ferrules, 1/16", SS, 5/pk Price on request CTS-A11336 Cartridge, Intelligent Valve Price on request