Easy Gardener 522 2-Pack Bark Gard Tree Guard (Discontinued by Manufacturer) 8-Inch tall plastic shield that coils around the tree and expands with tree growth, creating a long-lasting physical barrier against lawn mowers and string trimmers - the No. 1 cause of young-tree death Attractive, natural brown color blends in with its surroundings, reflecting away the hot sun's rays to prevent bark splitting while allowing the tree to breath Weather resistant and expandable, provides years of protection, ensuring young trees a long, healthy life One coil fits a tree up to 4 inches in diameter 8-Inch tall