The acrylic bar on this perch allows it to sway – much as a bird’s perch might sway in the wind in nature. The LARGE perch is 30.5cm long. The perch part is 27cm long and 3 cm in diameter. It is suitable for Amazons, Congos, Cockatoos and Eclectus. You can attach it to the top or the side of the cage. Start by gently springing the perch with your hand and, once your bird has the hang of it - watch him/her bounce and sway!