... .Type Pocket Filter Usage Liquid Filter Certificate ISO Liquid filter bag 1. (micron): 1, 5, 10, 25, 50, 75, ... 100, 150, 200 2. International standard filter bag: ES-1, ES-2, ES-3, ES-4 Liquid filter ... bag Filter bag filter ability(micron): 1, 5, 10, 25, 50, 75 ... , 100, 150, 200 International standard filter bag parameter: ES-1, ES-2, ES-3, ES-4 PPS ...