... 4)ISO9001:2008 disc filter wire mesh filter disc,stainless steel filter disc,galvanized filter disc,black filter disc,etc.ISO manufacturer1--- ... 304,304l,316,316l,etc.2---Memo:single layer,double layer,three layers,four layers and so on.3 ... filtration , eliminating droplet droplet of vaporor gas , air cleaner of automobile and tractor6---Characteristic Filter Precision: 2~300um Heat Resistance: - ...