International standard All types of masks are made from materials meeting international quality standards under strict selection and control. Quality products Masksâ?? shape and style are constantly checked to ensure that they follow technical standards and are in good conditions. Clean environment Masks are manufactured in a sterile environment and are sterilized during the manufacturing process. Modern machinery Modern machinery and equipment meeting standards to manufacture products with high quality requirements. Single Use Medical Mask Structure: outer layer, filter layer, inner layer, nose strip, ear loops Type: Sterilized/ Non sterilized Dimensions: 17x18 cm (pleated) Bacterial filtration efficiency (BFE): 99.9% Usage: In public areas, at home, in hospitals Related certifications: CE, FDA, ISO13485, ISO9001-2015, EN14683....