Product review (3 stars): USING AS REPLACEMENT FOR LITTER BOX CARBON FILTER.  SERVES MY PURPOSE!
I purchased this to use as replacement carbon filters for my cats covered BoodaBox litter box because  the filters for the litter box have been discontinued. I had to cut these sheets to size, which was no problem. This carbon material is not as dense or rigid as the filters specifically made for the litter box so I had trouble pushing this material through the filter channels, but I was able to do so with the help of a tweezer however it was very time-consuming to inch the filter material through the filter channels, and the carbon particles were getting all over my floor and the litter box lid. I had trouble cleaning the carbon spots off of the lid.  The good news is that its been 3 days and this filter seems to be doing its job...no odor emanating from the litter box