Check Valve Cartridge, 2/pk Back Catalog number: CTS-A094 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-1602 Seal, Polyethylene, High Pressure, Piston Price on request CTS-21045 SUS Tubing A Price on request CTS-11091 ACQUITY BSM Performance Maintenance Kit Price on request