Since 1970, Four Paws has been delivering the highest quality products to simplify pet parenting and help our furry friends stay happy and healthy. Add this Expansion Kit to your Premium Patch Pet Potty (sold separately) to customize the perfect potty area for your dog! Simply connect and lock these tray panels for a larger, gap-free potty. Intended for all kinds of dogs, the expanded pet potty patch system is a trusted solution for both indoor and outdoor use. From puppy potty training to offering your adult dog a dedicated place to go when you're not home, our dog potty patch expansion kit is ideal for a variety of scenarios. The Premium Patch Expansion Kit is designed Easy Clean Home Technology, so there's no need to worry about leaks or messes. Just place a standard-size Wee-Wee Pads or Premium Patch Washable Pad in the dog potty tray area for a seamless fit and let our absorptive Leak-Guard System shield and protect floors. When it's time to clean up, each tray panel's non-stick surface will make the task easier than ever! This kit also includes an optional quick-dry grass mat to give your dog the feel of lush grass under their paws. The Expansion Kit is 24.5 inches by 23 inches and recommended for dogs up to 50 pounds.