Insight Sand Perch SwingInsight products for birds are specially designed for a bird's well-being. Activate your bird's body, mind and soul. Our Insight Sand Perch Swing with varying diameters along the length of the Insight Bird Perch Swing exercise the muscles in your bird's feet while the rough texture provides an excellent surface for normal wear of your bird's nails. Our swing easily attaches to cage ceiling wire. Small is sized right for parakeets and similar sized birds. Regular is sized right for cockatiels and similar sized birds.