These high standards of micro-filtration vacuum cleaner bags are made to fit the cartridge Oreck Compact, also known as B. Oreck Buster is the "free" canister, which you get when you buy an Oreck. These bags are made by Envirocare, the leaders in sacks of empty parts of high quality. Each bag is multi-layer construction, in order to ensure efficiency 99.7% of all airborne particles. 12 bags are included in each package. These bags fit the following model numbers Oreck Buster B; BB1000DB; BB1000DB; BB1000DBSQ; BB1000DC; BB1000DC; BB1100DBSQ; BB1100DC, BB280, BB850AD; BB850AS; BB850AW; BB870AD; BB870AS; BB870AW;