Intended for qualitative fit testing of air-purifying respirators, this Smoke Test Kit offers everything needed for meeting OSHA’s protocol for fit testing with smoke. Includes irritant smoke tubes, an aspirator assembly, and a fit test record form in a protective carry pouch. Provides a fast, safe and easy method to perform qualitative respirator fit checks on air purifying respirators. When activated, Stannic Chloride is a white colorless gas with a pungent odor. It fumes strongly in moist air forming white hydrochloric acid fume. The emitted tin compound has a strong odor that will provoke an involuntary reaction (i.e. coughing) by the test subject.