If you purchased your Smokeless Ashtray from me, or Your Smokeless Ashtray resembles this one...... ......then these are the replacement filters you will eventually need. Your unit requires two replacement filters.   What I offer here is, THREE BOXES of these six count pack of the filters, which refills your Smokeless Ashtrays NINE times. (18 total individual filters)    You will receive  THREE BOXES of these six count pack of the filters, which refills your Smokeless Ashtray NINE times.   (18 total individual filters)   Thank You! not for sale to minors