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This product is designed, manufactured, labeled, and packaged for sale to industrial and professional customers for workplace use; it is not intended for consumer sale or use Use to conduct quantitative fit testing on 3M Secure Click Reusable Respirators with speaking diaphragm Includes head harness assembly Not for use with 3M Secure Click Respirators without Speaking Diaphragm - for these respirators manually probe the respirator For quantitative fit testing