Convert your North half mask or full facepiece to continuous flow with the CF2007. This breathing tube attaches to North facepiece cartridge connectors, eliminating the need for special adapters or tools. NIOSH approved for use with North 5500, 7700, 5400 and 7600 Series including full facepieces with welding front. Facepieces, hoses and couplers sold separately. Refer to pages 32 and 33 in the respiratory catalog for a complete listing of hoses and couplers, and pages 10 through 13 for facepieces.