Applicable model: The vacuum cleaner filter element is suitable for Q6, Q7, Q8, WQ61, WQ71, WQ81. Tightly adjusts the position of the original hole with precise shape. Regular replacement: Depending on the frequency of use, it is recommended to replace the spare parts every 2-3 months to ensure that the machine works at its best. Improve cleaning efficiency: The filter element of the vacuum cleaner can reduce allergens such as dust and pollen entering the air you breathe. Easy to install: The vacuum filter is easy to install and disassemble, convenient for daily maintenance; you can replace the old or damaged parts to restore optimal performance. Premium Material: Made of high-strength environmentally friendly ABS and high-efficiency air-jointed materials to ensure the best performance and a healthy lifestyle. Note: The data are all manual measurements; please allow 1-3 cm error. Due to light and display differences, there may be some color difference. Please refer to the physical item received.