... face mask,earloop & tie-on; 9.0cm X 17cm;Low breathing resistance with high filtration efficiency.50pcs/box,2,000pcs/ctn. Surgical Face Masks3-Layer Face Mask ... ,Elastic Ear Loop and Tie-on type;Specifications:9cm X 17cm;1).Composition ... ,food processing,factory,surgery,pharmacy,electronics,beauty salon,etc. Surgical face mask