HART standard dust collection bags fit 4-9 gallon HART wet/dry vacuum models and most other 4-9 gallon standard wet/dry vacuums. Dust bags increase filtration by keeping smaller particles contained in the unit and making clean-up easier. VDBMA 3701 dust bags can be used when vacuuming household debris dirt and sawdust. For dry pick-up only. Includes: (3) 4-9 gallon standard dust collection bags. Do not use the collection bag to vacuum hazardous or toxic materials. Do not vacuum anything that is burning or smoking such as cigarettes matches or hot ashes.