The Makita® PTFE Flat Filter is designed to work with the Makita® 11 Gallon Wet/Dry HEPA Filter Dust Extractor/Vacuum (VC4210, sold separately) in a variety of dust extracting applications. The convenient design means these filters collect both wet and dry materials. These filters install quickly and easily for added user convenience. Recommended for use with the Fleece Filter Bag (W107418353, sold separately) for maximum efficiency and longer life.