Grade AE is a Binderless Borosilicate Glass Microfiber Filters.  Fine porosity, fast flow rate, excellent wet strength with a 1.0μm size particle retention, and a 3.6μm mean pore size. These binderless borosilicate glass microfiber filters are primarily used in suspended solids and air monitoring testing. The Dispersed Oil Particulate (DOP) efficiency is 99.98%.