... ---Memo:single layer,double layer,three layers,four layers and so on.3---Detailed specifications:(1) Mesh Sizes: ... twill weaving, it has the performance of acid-resisting, alkali-resisting, heat-resisting and wear-resisting etc.5--- Uses: ... , evaporation, filtration , eliminating droplet droplet of vaporor gas , air cleaner of automobile and tractor6---Characteristic Filter Precision: 2~300um Heat ...