100% cotton rope, sisal rope, natural leather, nontoxic dye. Your Parrot will be crazy about it ! Let them try this therapeutic toy. 16" Pyramid is for Budgies, Parrotlets, Neophemas, Cockatiels, Lovebirds, Very Small Conures etc? Hangs from 1/4" cotton rope with 1/8 quick link.20" Pyramid is designed for Conures, Senegals, Quakers, Caiques etc...and all SMALL PARROTS. Hangs from 3/8" cotton rope with 1/8 quick link.30" Pyramid is for Medium Cockatoos, Amazon, African Grey, Eclectus... and all MEDIUM PARROTS. Hangs from 1/2" cotton rope with 1/8 quick link.45" Pyramid is for MACAWS, COCKATOOS ETC?AND ALL LARGE PARROTS. Hangs from 1/2" cotton rope with 3/16 quick link.