This is a very nice, very durable, tons of fun, 100% Superior cotton rope swing. Any medium to large bird, (500 to 800 grams) will enjoy this nice, soft place to sleep in the top of their cage. The cool part about these is, the more your birds use them, the nicer they look. This is also a wonderful preening toy for feather pluckers. The inside is a 100% bird safe, welded ring (unlike most that are wood and easily chewed). We use over a 100 feet of cotton rope on this toy. It is topped off with a swivel so it spins 180 degrees for added fun!