The RIDGID VF3400 (54208) 1-Layer Standard Filter for 3 to 4 1/2 Gallon Wet/Dry Vacuums is designed to capture everyday dirt and debris such as sawdust, dirt and typical debris found in a basement, garage or vehicle. The filter fits all RIDGID wet dry vacs 3 to 4.5 gallons. With its patented QwikLock feature, the filter simply snaps on or off the vacuum for easy cleaning.