Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21109 Capillary, 600mm x 0.17mm ID Price on request CTS-11080 Alliant Solvent Mgr PM Kit Price on request CTS-21183 Peristaltic Pump Price on request