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If your employee's wear a respirator, they must first have a medical evaluation as specified in OSHA’s Respiratory Protection standard 29 CFR 1910.134. Please choose a quantity that represents the total number of your employee's that wear a respirator. We will contact you on how to proceed after your order comes through. For more information about OSHA standards and dental mercury, please read our article OSHA’s Respiratory Protection Standard & Dental Mercury.