Boing SisalIn the wild birds go about their business on branches that move around, and birds are able to move seamlessly within this wobbly environment. The bungee helps replicate this environment and provides lots of moving with both physical and mental stimulation involved which helps keep your parrot busy and active throughout the day. Colours may vary to picture Measurements (approximate) Small approx. 1. 2m long unravelled x 2cm diameter sisal rope Medium