Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-1598 Check Valve Assembly, Inlet Price on request CTS-6809 Mobile Phase Transfer Line, TFE, 3/16" OD x 1/8" I Price on request CTS-21463 Check Valve Cartridge, Ceramic, 2/pk Price on request