Product review (5 stars): Good replacement product.
Much thicker than the original pre-filter pad that came with the unit.  I have been using these replacement filters for some time and have been very pleased with their performance.  There are two pads in each package and each is complete with two velcro strips.  These strips are reusable.  I have had no trouble with carbon falling out of the pads - everything seems very tight and well made.