3ply face mask,earloop & tie-on; 9.0cm X 17cm;Low ... high filtration efficiency.50pcs/box,2,000pcs/ctn. Surgical Face Masks3-Layer Face Mask,Elastic Ear Loop and Tie-on type;Specifications ... straps for tight facial seal;4).Colours:blue,green,white;5).50pcs/box,2000pcs/ctn.Special 3-layer design respirator produced ... food processing,factory,surgery,pharmacy,electronics,beauty salon,etc. Surgical face mask