Check Valve Cartridge, 2/pk Back Catalog number: CTS-10493 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-4116 Sample Needle Kit, 15µL Price on request CTS-10984 Sparge Diffuser Price on request PL7050150 MarvelXACT PLS 50µm x 150mm Price on request