Pentek BP-410-5 Polypropylene Felt Filter Bag, 8-5/8" x 4", 5 Microns, Pack of 20 Reduces sand, silt, scale, and rust particles in residential and commercial drinking water and industrial fluid applications Nominal filtration rating of 5 microns Glazed polypropylene felt layers on a supporting scrim for high solids loading capacity and reduced fiber migration Maximum flow rate of 20 gpm Maximum temperature of 200 degrees F (93.3 degrees C)