DeepRoot Tree Root Barrier Retail Kit, five (5) 18-inch x 24-inch panels per pack Five (5) - 18" deep x 24" wide panels per pack, enough for a 5-15 gallon tree 90Degree vertical ribs prevent damage by guiding roots down and away from hardscapes Zipper joining system for fast and easy assembly Injection molded 75% re-processed polypropylene Made in the USA