R.S. Hughes carries a large selection of shapes and sizes to help best meet your specific applications. Width, length & height are some of the more common measurements to consider. This product has a 4.2 in width x 3.4 in height. The 3M reusable respirator cartridge is packaged 60 per case, meets NIOSH Approved standards and is for use with 6000 & 7000 Series Full Facepiece Respirator, 6000 Series Half Facepiece Respirator, 7000 Series Half Facepiece Respirator, FF-400 - Respirator. Comes with and supports a bayonet connection.