The Washable Pre Filter is capable of tackling particles of lower than 0.3 microns size. Suitable for areas of up to 250 square feet, the filter can perform its operation in 3-step. The filter is made from aluminum mesh pad of multiple expanded aluminum foil layers. Our filter removes up to 99.9% airborne particles from the surroundings. Our filter is ideal for air cleaning application in commercial, residential and OEM units. The filter is used in most of the ventilation systems because of its easy maintenance and extended durability. The Washable Pre Filter can be washed off easily to remove captured contaminants.