The main purpose of cardboard filters is: collection of sprayed mist and air-borne fine particles and dusts present in work spaces. BENEFITS APP FKB 10 / FKW 10: High efficiency ca. 2-3 times higher comparing to other filters, Maximum filtration efficiency as much as 100%, depending on paint type, Long replacement interval that results in high paint booth production capacity, Constant air flow within paint booth during filter operation , Very easy to use.