Milwaukee Fleece Dust Bags (5PK) are designed to work seamlessly with the M18 FUEL™ 9 Gallon Dual Battery Dust Extractor featuring PACKOUT™ Compatibility and VACLINK™ technology. These fleece bags serve as a fully enclosed pre-filter that effectively captures fine dust particles. By using these dust bags, the lifespan of the main filters is extended, and dust exposure is significantly reduced during disposal, ensuring a cleaner and safer work environment. Model Number: 49-90-1969