WORKSHOP Wet Dry Vacuum Filters WS13045F2 HEPA Media Filter For Shop Vacuum Cleaner (2-Pack - HEPA Media Filter For Wet Dry Vacuum Cleaner) Fits WORKSHOP 3-Gallon to 4-1/2-Gallon Shop Vacuum Cleaners Qwik-Lock Filter Fastening System makes removing and installing wet dry vacuum filters quick, easy and secure. 5-layer HEPA media captures pollens, allergens, fine particles, and everyday dirt. This material captures particles down to 0.3 microns at 99.97% efficiency The pleated cartridge filter design on this HEPA media filter allows a filter to have more surface area in a confined space to improve airflow and reduce clogging. 2-Pack- HEPA media filter for shop vacuum cleaner. 2-Packs save money and helps keep a filter on hand. Replace even the hardest working wet dry vacuum cleaner filter twice a year to keep your shop vacuum cleaner functioning at its best