Eco-Friendly and exciting for your cat. These eco-friendly toys are made with solid wood balls that are finished with natural soy-based stains. They hang from looped and knotted hemp twine with no metal connectors. Can be used with any ActiveCat scratching post that has a Toy Hook. Please note: All ActiveCat Eco-line scratching posts come standard with a pre-attached toy. Sold two per package. Additional packages ship for free.