Check Valve Cartridge, 2/pk Back Catalog number: CTS-10600 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21564 Needle, Uncoated 10 Series Price on request CTS-A11376 Mixer Assembly, 100μL Price on request CTS-11091 ACQUITY BSM Performance Maintenance Kit Price on request