The efficient HEPA filtration system captures 99.75% of particulates .3 microns and larger. It installs quickly and easily for added user convenience. The Makita HEPA Filter is designed to work with the Makita 18V X2 (36V) LXT Brushless Cordless HEPA Filter Upright Vacuums (XCV19, sold separately). The HEPA filter ensures maximum protection against find dust and contaminants. They are made from high-quality material for durability and long life.