Cartridge, BioAcquity, I2V Back Catalog number: CTS-21192 Availability: In the manufacturer's stock Price on request - + Recommended 11-3889 Needle Seat Assembly, 0.12mm ID Price on request CTS-21100 UPLC Check Valve Assy, Spring Loaded Price on request CTS-A11431-02 Cartridge Check Valve Housing, 2/pk Price on request