Original Vacuum Bags made by, or manufactured for the manufacturer of the machine. Meets the original engineered manufacturers specification(OEM) standard designed by the maker of the machine. Often times, the manufacturers offer Regular and Micro filtration bags in same type bag. If you need higher quality filter bag, choose micro filtration bags. Click Genuine bag button for original bags. Check OEM part number and type of the bag before you order to make sure you are ordering right bag .