Prevue Pet Products Wood Corner Shelf Platform 3300 gives birds a place to sit， play or sleep. Multiple shelves can be placed throughout a cage to give each bird their own space. Hang toys from the roof above the shelf， or dangle toys from the platform into the space below. Attaches easily to the corner of any cage; hardware included. Each dowel is ½’’ diameter. Measures 7’’ long by 7’’ wide and 1 ½’’ high.