Inlet Check Valve Back Catalog number: CTS-21145 Availability: In the manufacturer's stock Price on request - + Recommended CTS-21155 Capillary, 300mm x 0.17mm ID, w/Fittings Price on request CTS-21109 Capillary, 600mm x 0.17mm ID Price on request CTS-11335 ACQUITY H-Class QSM Performance Maintenance Kit Price on request