WORKSHOP Wet Dry Vac Filter WS12045F Fine Dust Wet Dry Vacuum Filter (Single Shop Vacuum Cleaner Filter Cartridge) For WORKSHOP 3-Gallon to 4-1/2-Gallon Shop Vacuum Cleaners Qwik-Lock Filter Fastening System makes removing and installing the wet dry vacuum filter quick, easy and secure. wet dry vac filters with 3-layer Fine Dust material captures everyday dirt and fine particles such as drywall dust, concrete dust, fine powders, and cold ashes. The media captures particles down to 1 micron at 99% efficiency. The pleated cartridge filter design on this wet dry vacuum filter allow the filter to have more surface area in a confined space improving airflow and reduce clogging. Durable wet vac filter material is washable, and can be used for smaller wet pick-up. Replace even the hardest working wet dry vacuum cleaner filter twice a year to keep your shop vacuum cleaner functioning at its best