Made specifically for the HP 60 & HP 80, these filters ensure optimal performance of your air pump. Measures approximately 4.3" 3.8" in size .(Manual measurement size there may beerrors) Our Cleaning your filter every 6 months is recommended.It is also reccommended to replace your filter once a year.If your filter is not properly cleaned it can cause serous problems for your air pump. Our products can help clean your machine and filter out impurities and dust. The package contains 16 pieces of Air Filter, convenient and practical. Suitable For Replacement of Hp80/Hp60/Hp-80/Hp-60 Air Filter Cotton.Filters are crucial component in your air pump. Please confirm the replacement part number before purchasing to ensure that our product is right for you.