1.Made of PP or PE . 2.Thickness from 1.6, 1.8mm, 2mm. 3.Air permeability from 0.03, 0.2, ... 0.3, 0.6, 1.0 to 2.7 ... PE fiber. Features is Acid and Alkali resistance. Thickness from 1.6, 1.8mm, 2mm.Air permeability from 0.03, 0.2, 0 ... .3, 0.6, 1.0 to 2.7 m3/m2/min.Reinforced Edge.Could ...