This all natural wood perch is made to be durable and chew resistant. It easily mounts to almost any cage, inside or out with simple washers and a wing-nut, without tools needed. The shape of the perch is designed to cater to soothing and exercising bird's feet. Single Natural Wood Bolt-On Perch is available in the following sizes: 
8" long perch
10" long perch
14" long perch
18" long perch