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.