Check Valve Cartridge, 2/pk Back Catalog number: CTS-A094 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-3102 Sapphire Plunger Price on request 11-3889 Needle Seat Assembly, 0.12mm ID Price on request 11-3602 Tubing, Pump Outlet, GP Price on request