Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-3830 Metering device Seal Price on request CTS-A11374 Tube Assy, SSV to I2V Price on request CTS-21591 PM Kit, G4226A Price on request