Compatible with Miele Triflex HX1 3-in-1 Cordless Vacuum Cleaner, Replacement Part No. 9178017731 High Performance: This filter removes 99% of dirt, hair and small debris. Fresh exhaust gas can prevent dust, reduce dust damage to machine parts, and has no secondary pollution. Washable and Durable: The replacement filter can be washed. Just rinse it with clean water and let it air dry completely before reusing it 2 filters. Note: If you want to remove the element and filter, install the filter on the vacuum cleaner and remove the filter by pulling the pull button on the filter. Note: The data are all measured manually, please allow 1-3cm error, due to differences in light and display, there may be some color differences, please refer to the actual item received.