Koanhinn Pack of 2 3 Layer Replacement Filter for VF3500 3-4.5 Gallon Vacuum Cleaner WD3050, WD4070, WD4080, WD4522, 4000RV, 4500RV

new, high quality material, well made, and well matched the equipment. The contents of the accessory can be easily removed and replaced as part of routine maintenance. Clean accessories home robot performs its best performance. Cleaning accessories keep your robot clean while reducing the penetration of pollen and other into the breathing air. To achieve the best cleaning filter effect, the cleaning accessories should be replaced every 2-3 months per frequency of use.