Fits Rid gid VF3500 3-layer filter ... get optimal performance out of your vac, it's better to replace the filter at least twice a year with average use....

The RIDGID fine dust pleated paper replacement filter is designed for your RIDGID wet dry vacuum (3 - 4.5 gal.) to capture fine dust and trap particles such as mold, fine powders and cool fireplace ash. The RIDGID wet dry vac 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 vacuum life as it protects the motor from harmful dust and debris. This product offers one fine dust filter that fits RIDGID wet dry shop vacs 3 gal. to 4.5 gal. along with the RIDGID Ash and Grilling Vacuum (HD

Application: WD3050(WD30500), WD4050(WD40500), WD4070, WD4080, WD4522, 4000RV, 4500RV. Compatible Devices Ridgid wet dry vacuum cleaners 3-4.5 gallon. It makes the filter have a larger surface area to get more unwanted things inside the vacuum and no more clogging.