Check Valve Cartridge, 2/pk Back Catalog number: CTS-10493 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A11376 Mixer Assembly, 100μL Price on request CTS-11335 ACQUITY H-Class QSM Performance Maintenance Kit Price on request PL7100350 MarvelXACT PLS 100µm x 350mm Price on request