20" by 20" by 1" electronic air filter plus 9 filter mediums,( each bag holds 2 filters ), plus 1 AC adaptor 24V Original cost, $250 This works on low voltage (24 V) Most people are not familiar with this filter, it does a great job. We converted to a heat pump, don`t need it any more. If nothing else, the filters could be cut down to a size of the Tox Box you own and you would be still ahead. $40, or make me an offer