Spiral Shelters are undoubtedly the most popular low-cost rabbit guards for protecting single-stemmed tree seedlings / transplants. Recycled PVC Spiral Shelters have the ability to expand with the growing tree stem and provide a sheltered environment to enhance growth. Acorn’s rabbit guard spirals are manufactured with a generous overlap to protect from herbicide spray and provide greater browsing protection once the spiral begins to unwind. All Acorn's spiral shelters are uniquely manufactured with a green tint which helps to prevent leaf scorch and significantly reduces their visual intrusiveness. Spiral shelter tree guards are manufactured in three heights and four diameters to suit your requirements.