Replacement filter for Bosch VAC series vacuums. HEPA filter captures 99.97% or particles 0.3 microns and larger. When VF120H is used in a Bosch HEPA ready VAC series dust extractor, the unit meets the EPA criteria for a HEPA vacuum and can be used for RRP applications. The use of a paper or fleece filter bag is highly recommended when using using VF120H. The filter bag may help prevent the HEPA filter from being directly exposed to abrasive materials and sharp objects that can be collected during normal use of a dust extractor. The use of automatic or semi-automatic filter cleaning is not recommended when a HEPA filter is installed in the dust extractor.