... :160g,180g,200g,220g,240g 2.Cup Shape Style 3.High filtrability 4.ISO/CE/Nelson Cone Respirator Mask Dust/Gas ... adapt to various face-shapes with comfortable sealing.4) The high-efficient and strong electrostatic filtering materials effectively filter the solid particle ... to your emails as soon as possible, however, due to high volume of daily incoming emails and time zone difference; we ...