This NIOSH-approved L-188 N95 respirator mask is a reliable choice for protection against airborne particles. With a unit quantity of 20 masks per box and a total of 400 masks in the lot, this mask is suitable for various healthcare, lab, and dental procedures.The mask is made in China and is intended for use in physical laboratory, pediatrics, plastic surgery, nephrology, cosmetology, oncology, veterinary medicine, medical laboratory, urology, gastroenterology, dental laboratory, cardiology, emergency medicine, hematology, dermatology, rheumatology, internal medicine, dentistry, thoracic surgery, orthodontics, biological laboratory, obstetrics & gynecology, family medicine, neurology, pathology, orthopedics, physical medicine & rehabilitation, endodontics, anesthesiology, and more.