Check Valve Cartridge, 2/pk Back Catalog number: CTS-10600 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-2570 Needle Seat Price on request CTS-21171 Rotor Seal, H-Assy, 6 Port 2-Position Price on request CTS-10989 Face Seals, 4/pk Price on request