These disposable paper bags come 10 per pack, and fit the now discontinued Powr-Flite® Enviro-Clean PF14 and PF18 dual motor upright vacuums. They are an essential part to the overall filtration of the vacuums. They hold 6.4 quarts when full, and help to keep all debris and dust contained for later disposal. The filter compartment will not close unless these bags are installed properly to help protect the vacuum motor from running without a bag.