The RIDGID HEPA material pleated paper filter is designed for your RIDGID wet dry vacuum (3 - 4.5 gal.) to capture allergens and trap particles such as everyday dirt, drywall dust, pollen and pet dander. The replacement HEPA material filter can be washed and, if dried properly, reused. Changing shop vac filters often is strongly recommended to increase the vac's performance and to help extend wet dry vacuum life as it protects the motor from harmful dust and debris. This HEPA Material Filter fits RIDGID wet dry shop vacs 3 gal. to 4.5 gal. along with the RIDGID Ash and Grilling Vacuum (HDAV0500) and should only be used for dry pickup. With its patented Qwik Lock feature, the filter simply snaps on or off the shop vacuum for easy cleaning and to quickly switch filter options. RIDGID provides other filtration offerings, including the VF3500 Fine Dust Filter, the VF3700 Wet Application Filter, and the VF3800 HEPA Filter, depending on the job application and type of cleanup mess.