... purification area. 2,CE ISO Approved 3,BEF90%~99% 3-ply face mask with filter1, 17.5*9.5cm,2, 3-ply, ... box , the box can be produced according to your requirementHeng Sheng Medical specialized in making various healthcare and medical supplies. Quality consistent with ... the ISO9001, ISO13485, CE standards and China State Food& ...