The Original Miele Air Clean 3D Efficiency Vacuum Bag, Type U, includes 12 bags with pre motor and post motor filters designed specifically for Miele vacuum cleaners. These bags are compatible only with Miele models and are part of the Miele AirClean 3D series. The set includes 12 vacuum cleaner bags, providing a thorough cleaning solution for your household. The high-quality Miele brand ensures efficient and reliable filtration to keep your home clean and healthy.