These garbage bags can also be used with the automatic cat litter box, petsnowy. Please refer to the 3rd and 4th images for instructions on how to use them. The official product costs around 67 yen per bag (when purchasing 120 bags), whereas these are about 49 yen per bag, making them cost-effective for frequent changes! I use them for my own cat, and they work without any problems. Number of sheets: 20 x 3 = 60 sheets Size: Approximately 67 x 40cm Please understand that these are not official petsnowy products before purchasing. Instant purchase: OK #petsnowy #cat #cat #garbagebag #catlitter