... particles from gas fluid under normal temperature and humidity. Dust Air Filter Bag DescriptionThe filter bag adopt composite nonwoven cloth ... is mainly used for air purification in electronic, food, pharmacy, mechanical, petrochemical and light industry.Technical DataFilter Grade: G1, G2, ... Sizes Are Available Filtration Rating• 1, 5, 10, 25 micron Dust Collector Air Filter Bag/Pocket Air Filter Bag