The package includes 10 Kärcher vacuum cleaner bags and 2 Kärcher vacuum cleaner filters. Compatible with Kärcher WD4 WD5 MV4. With 5 layers of microfiber, the highly efficient Kärcher WD4 vacuum cleaner bag can filter 99% of fine particles in the air, allowing the air cleaned by the vacuum cleaner to be removed to reduce secondary pollution. 99.7% high-efficiency filtration. The Kärcher MV4 vacuum cleaner filter can block 0.03 micron particles and other debris. Easy to install and remove. To ensure the best performance of your vacuum cleaner, please change the Kärcher WD5 dust bag and the Kärcher WD4 filter every 2 to 3 months.