Check Valve, Secondary Inlet Back Catalog number: 11-1600 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-3889 Needle Seat Assembly, 0.12mm ID Price on request CTS-21095 Seal Wash (0.0787 ID, Fixed, Bio), 2/pk Price on request CTS-10548 Gold Plunger Seal, Analytical Heads Price on request