Deer, squirrel, rabbits and woodchucks cannot bite or rub tree bark through this rigid plastic mesh. Trunks are shielded by open mesh, which prevents moisture and mildew build-up. Also, the protectors won't harbor insects and animals, and won't inhibit growth. These tubes are designed to blend in. Flexible and easy to install, in three lengths, 4in diameter. Priced and sold only in bundles of 5.