The size of disposable medical masks is 17.5cmx9.5cm, 50 pieces / box, 2000 pieces / box. The masks can be divided into three-layer masks, non-woven masks, four-layer masks and activated carbon masks. The three-layer mask is made of two layers of non-woven fabric and filter paper; the three-layer mask is made of two layers of fiber non-woven fabric specially used for medical and health care, with a layer added in the middle to filter and prevent more than 99% of bacteria. The nose bridge is made of environment-friendly full plastic strip, which does not contain any metal, is equipped with vapor permeable and comfortable. Filtration efficiency b.f.e up to 99% It is especially suitable for electronic factories. The active carbon mask is made of 28g non-woven fabric on the surface and anti-bacterial filter paper in the middle layer, which can prevent bacteria and virus damage. The second layer in the middle is made of activated carbon fiber and activated carbon cloth, which has the functions of anti-virus, deodorization, bacteria filtering and dust prevention The design of nose bridge clip can be adjusted according to different face shape. The inner cladding ultrasonic spot welding can make the ear band firm and not easy to fall off. Masks can be used in electronic manufacturing, dust-free workshops, catering services, food processing, schools, motorcycles, spraying processing, stamping hardware, electroplating, chemical industry, steel, welding sites, health centers, Handcraft industry, hospital, cosmetology, pharmacy, factory, environmental cleaning, public places and other uses: hang the elastic ear on both ears, match the whole nose type, press the fixed piece gently to make the mask fit the face. Main technical indicators: carbon tetrachloride adsorption rate: > 70% benzene adsorption rate: ≥ 15% resistance: 80% area weight: 35 ~ 45g / m2. Remarks: 1. Size: 9cmx17.52. Product.