filter fineness about 0.1um-60um larger filtering ... 20', 30', 40', 60' consist of polypropylene filtering membrane, nylon and PTEE micro-aperture filtering membranewidely used in electronic ... industry, medical industry, chemistry , etc.filter fineness about 0.1um-60umlarger filtering proportion sift more impurities ... outside diameter: 63mm, 68.5mm, 117mm pleated water filter