The ceramic low-carbon steel pipe is manufactured by the self-propagating high-temperature synthesis centrifugal method. That is, the seamless steel pipe is placed in the tube mold of the centrifuge, and a mixture of iron oxide powder and aluminum powder
Features:1.Using four layers of non-woven material2.High efficiency filter layer with advanced electrostatic charged microfiber3.Nontoxic, no smell,no sensitivity and non-irritating to skin4.Welded strap helps to fit for most face sizes and head shapes, h