House training your pet can be simple when utilizing the benefits of the Set of 3 Puppy Pads Pet Training Pads by PETMAKER. These artificial grass dog pads are designed to fit and work with the PETMAKER Pee Pad Holder tray system (not included). These replacement dog pee pads can easily be swapped out, so your cat or dog always has an acceptable place to relieve themselves, which ensures a cleaner house, apartment, or patio.