Purchased from Charm in August 2025. The cage size wasn't compatible, so I'm offering it to someone who can use it. One bag has been opened, and I think I used about 1 or 2 sheets. Reprinted from the purchase site below: Compatible cages: 35-square, 35-hand-held, Heartful House L, Sweet Package M, and other cages with compatible tray sizes. Features: This product is exclusively for HOEI 35 series and Heartful House L. Simply place it on the bottom tray of the cage, and you can easily replace the sheets by just peeling them off when they get dirty. The soiled sheets can be disposed of as combustible waste. Quantity: 15 sheets per set x 5 bags (1 or 2 sheets used)