SIZE: 17cm x 19cm/6.7" x 7.48". Suitable for macaws,conures, african greys cockatoo and a variety of amazon parrots. These bird perch rough-surface is made of natural quartz sands and high quality PVC inside with food grade color, non-toxic materials. ENJOY THE FUN: parrot sand perch provides excellent foot exercise and the hard coating on the surface keeps beaks and nails trimmed naturally,safety to chew as well. EASY TO INSTALL: Each parrot perch is fully outfitted with a metal wing nut and a built-in bolt. No extra equipment is required for installation and the perches deliver a secure hold.