I am selling three unopened packs of 20-sheet (for one week) deodorizing and antibacterial replacement sheets specifically for cat litter boxes, designed for use with the Deotoilet system. These are manufactured by Unicharm Pet. For cats sensitive to odors, changing the sheet every day for a week is best. This prevents odors from accumulating. I will ship them in a box. Also, as a bonus, I will include 10 used sheets. The price remains the same. I think it's a good deal.