Master Garden Products Carbonized Barkless Willow Funnel Trellis, 48-Inch Use these natural willow funnel trellis as plant protectors as well as lawn decorations Expands to various heights and lengths, foldable and easy to store away when not in use Barkless willow sticks are treated in a high pressure carbonized chamber to remove the sugar content which helps them to last longer in the outdoors