The Makita main HEPA filter is designed to work with the Makita 36V (18V X2) LXT brushless HEPA filter backpack dry vacuums (XCV17 and XCV18, both sold separately) in a variety of dust extracting applications. The efficient HEPA filtration system captures 99.75% of particulates 0.3 microns and larger. These filters install quickly and easily for added user convenience. They are made from high-quality material for durability and long life.