Outlet Check Valve Assembly Back Catalog number: CTS-0721 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A11145 Tube Assy, System Outlet, SDS Price on request CTS-21089 Needle Seal (For pH 1-14, for operation up to 130 Price on request 11-2642 Needle Port Seal, AS-100, ASI-100T Price on request