Not for use in atmospheres containing less than 19.5% oxygen. 2. Not for use in atmosphere immediately dangerous to life or health. 3. Do not exceed maximum use concentrations established by regulatory standards 4. Failure to properly use and maintain this product could result in injury or death 5. All approved respirators shall be selected, fitted, used and maintaned in accordance with MSHA, OSHA and other applicable regulations 6. Never substitute modify add or omit parts. Use only exact replacement parts in the configuration as specified by the manufacturer 7. Refer to user Instructions and or maintenance manuals for information on use and mantenance of these respiratiors. 8. NIOSH does not avaluate respirators for use as surgical masks.