The Polyester Filter is designed for wet vacuuming uses, as well as dry, for VAC series dust extractors, including the VAC090A, the VAC090S, the VAC140A and the VAC140S. This filter captures 99.9% of particles 2.0 microns and larger. The flat design allows for greater canister capacity, allows for easy installation and does not extend down into the canister. The VF110 filter does not, however, allow any of the VAC series dust extractors to meet the EPA definition of a HEPA vacuum or to meet all of the OSHA filtration efficiency regulations for collecting respirable crystalline silica dust.