The RIDGID 3-layer pleated paper filter features a double-pleated design that captures fine particles such as dust, drywall sanding and fireplace ash. With its patented Qwik Lock™ feature, it simply snaps on or off the vacuum for easy cleaning. The filter fits all RIDGID wet/dry vacuums 5 gallons and larger.Captures 99% of all particles 1 micron in size and larger. Ideal for capturing drywall dust. Qwik Lock™ Fastening system. Fits all RIDGID brand vacs 5 gallons and larger. Washable and reusable. Includes 1 filter per package.