Plantra Trunk Saver? Solid Wall Tree Guards - Stem Bark Protection 18-in. Tube Height Plantra Solid Wall Tree Guards are white to reflect excess sunlight, opaque to reduce suckering, and twin-walled (corrugated) for strength. These tree guards are slit lengthwise and gently wrap around the trunk of sapling trees 1 to 3.5 inches in diameter. Once in place, the tree guard shields young bark tissue from the harmful effects of gnawing animals, mechanical weed control and weed sprays. Unlike other stiff and sharp corrugated products that can scrape and damage young bark while being installed or removed, Plantra Solid Wall Tree Guards pop open easily, gently wrap around the stem, and stay put all without the use of tools or additional tying equipment. These tree guards are tough to protect, removable, reusable and are UV stabilized for multiple seasons of use. Product Specifications - Plantra Trunk Saver Solid Wall Tree Guards - Trunk Bark Protection Tree guard heights 17.7 in - Protects against damage from small rabbits, mice, voles, string trimmer weed eaters, lawn mowers weed sprays 23.6 in - Protects against damage from small rabbits, string trimmer weed eaters, lawn mowers weed sprays 35.4 in - Protects against damage from large rabbits, string trimmer weed eaters, lawn mowers weed sprays 47.25 in - Protects against damage from buck deer antler rub, chewing beaver and nutria, string trimmer weed eaters, lawn mowers weed sprays Tube diameter when fully expanded = 99mm / 3.9in O.D. Construction = Rigid, twin-walled structure Color = Opaque white to block sunlight to reduce sun scaled in winter and suckering during the growing season Packaging = Packed in nests of 10 for efficient shipping and field handling Material = Environmentally sensitive polyethylene blend U.V. resistant for 5-7 years