These high efficienct disposable filter bags are ideal for picking up fine dust, such as drywall dust, cement dust and cold ashes. They are easy to use and install. The bags keep your tank clean and makes cleanup a breeze. Simply, remove the bag from the tank inlet and throw it in the trash. Two bags are included in a pack. Fits standard 10-14 gallon vac with the inlet located on the tank, for dry pickups only. non-hazardous, non-toxic, non-flammable materials only.