Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-1600 Check Valve, Secondary Inlet Price on request 11-4116 Sample Needle Kit, 15µL Price on request CTS-10692 HPMV Gold Seals, 2/pk Price on request