Kasco's Paper Air filter element is fit for both 1/4 & 1/2 HP Compressors. Keeping your air filter clean on your compressor will help prolong its life and make sure the compressor is pumping air to its full capacity. A clogged air filter can cause the compressor to have to work harder (run hotter) and could shorten the time before it needs to be rebuilt. Air filters should be checked once a month and if they are dirty they usually can be tapped out or cleaned with some compressed air. If the filter is really dirty, it should be replaced. Kasco’s air filter assemblies have a metal intake tube in them which should be checked when cleaned or replaced.