Perfect Compatibility This product is fully compatible with MV 4, MV 5, MV 6, 2.863-005.0 and WD 4/WD 4 Premium, WD 5/WD 5 P/WD 5 Premium/WD 5 P Premium, WD 6P Premium. It also fits models 1.348-271.0, 1.348-194.0, 1.348-191.0, 1.348-151.0 and 1.348-111.0. High Quality: The quality of our vacuum cleaner components matches or exceeds that of the original components. The compatibility and service life of our products are subject to rigorous testing. Our vacuum cleaner components are made of extremely durable and environmentally friendly materials, are washable, and can be reused multiple times. Highly efficient filter: The H12 HEPA filter is highly efficient and removes 99% of all dirt particles, hair, and small debris, as well as the smallest particles down to 0.3 µm (= 0.01 mm). It can be replaced in seconds without coming into contact with the dirt. For optimal performance (especially for families with children, pets, or smokers), we recommend replacing the filter every 3 months.