HART high efficiency dust collection bags fit 3-5 gallon HART wet/dry vacuum models and most other 3-5 gallon standard wet/dry vacuums. Dust bags increase filtration and help to keep smaller particles contained in the unit and make cleanup a snap. VHB35 3701 dust bags can be used when vacuuming drywall dust sawdust and other fine debris. For dry pick up only. Includes: (3) 3-5 gallon high efficiency 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.