WORKSHOP Wet Dry Vac Filter WS11045F Standard 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 Standard material captures everyday dirt such as sawdust and typical dirt. The media captures particles down to 5 microns at 95% 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 filters twice a year to keep your shop vacuum cleaner functioning at its best