Keep your bird entertained with the Penn Plax Cement Swing which is made out of wood and crushed seashells to provide birds with an added amount of calcium. The texture of the perch naturally trims the nails and the beak and the swing has a metal clip which can securely attach to any type of wire cage making it convenient to use and easy to set up. Available in numerous sizes so you can choose what suits the size of your bird best!