FLEECE DUST FILTER BAG DESIGN: Works with vac090-series dust extractors as a preliminary filter and a secure way to capture debris and dust HELPS WITH OSHA COMPLIANCE: When combined with the vac140-series dust extractor and a hepa filter, the vb140f can help move users toward compliance with the osha respirable crystalline silica dust regulation PRELIMINARY FILTER: Captures most of the debris and dust and increases the life of the main filter DEPENDABLE PORT COVER: Securely closes opening of the filter bag and keeps the dust and debris inside during the disposal process BOSCH PRO+GUARD: Provides hepa filtration as part of an end-to-end dust-protection system DESIGNED FOR DRY-VACUUMING ONLY: The vb140f is not intended for wet-vac use and will be damaged by wet-vacuuming; bosch offers the vb140s wet filter bag for wet-vac applications ENGINEERED FOR BOSCH DUST EXTRACTORS: Compatible with vac140-series dust extractors