Check Valve Cartridge, 2/pk Back Catalog number: CTS-10493 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21264 Uncoated Needle Kit Price on request CTS-2294-04 Plunger Seals, 4/pk Price on request CTS-21155 Capillary, 300mm x 0.17mm ID, w/Fittings Price on request