Speciality：
Common Applications: dust filtration, pre-filtration in air filter program 
Features: large filtering area, low initial resistance, high air flow, large dust holding capacity, completely droppable
Filter Media: Incremental structure of flame-retardant synthetic fiber filter media, conforming to the European DIN53438-F1 
Frame: Waterproofing chipboard, abandoned chipboard frame filters can be burned, no pollution, conforming to environmental requirements / metal frame also available. With unique design, it can be reused, reducing cost.