Backup Seal Back Catalog number: CTS-2963 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21192 Cartridge, BioAcquity, I2V Price on request CTS-6809 Mobile Phase Transfer Line, TFE, 3/16" OD x 1/8" I Price on request CTS-0621 Inlet Check Valve Cartridge Price on request