This enforcement cartridge is made of black polyamide and comes in olive/magenta. It has a 40 millimetre NATO thread connection and measures 3 height x 4 1/4 inches diameter. The enforcement cartridge meets the NIOSH standard and protects against ammonia, formaldehyde, HEPA, hydrogen chloride, hydrogen fluoride, and organic vapour. It is suitable for use with a full-facepiece respirator.