... , ventilation and paint-spray systems 1) Common Applications: dust filtration, pre-filtration in air filter program.2) Features ... area, low initial resistance, high air flow, large dust holding capacity, completely disposable.3) Filter Media: Incremental structure ... to the European DIN53438-F1.4) Frame: Waterproofing chipboard, abandoned chipboard frame filters can be burned,no pollution, conforming ...