Moldex Fit Test Kit contains all of the contents necessary to conduct a qualitative fit test for disposable and reusable respirators. OSHA requires that anyone who wears a respirator needs to be fit tested beforehand. The Moldex Bitrex Fit Test Kit meets the requirements established by OSHA 1910.134. Bitrex has a bitter taste that indicates breakthrough in respirator fit. Includes: fit test hood, threshold screening and fit test solution, nebulizers and step-by-step instructions.