3M 70070614501 Combination Cartridge, Yellow/Magenta, Connection: Bayonet, 4.2 Inch Length x 4.4 Inch Width x 3.4 Inch Height, For Type/Brand/Model: 3M Half And Full Face Pieces 6000, 7000 And FF-400 Series With Bayonet Filter Holders For Additional Product Information, click here