Check Valve Cartridge, 2/pk Back Catalog number: CTS-10600 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-12013 Tungsten Lamp (1000 hr) Price on request 11-4134 Rotor Seal & Pod Repair Kit, Vespel, 3-Groove for Price on request 11-3321 Wash Seal Gasket, 6/pk Price on request