Made from Japanese Zelkova (Keyaki). Includes three Zelkova perches and one Hinoki step. The length and thickness are listed in the second photo. Since it's completely pesticide-free, there are many insect holes. I've removed or shaved off those parts, but there might be some subtle traces of insect damage remaining. I do my best to check. I believe it's gentler on birds than overly clean, chemically treated wood. It has been boiled and sun-dried. Because natural wood is used, there may be warping, knots, stains, and cracks. This is handmade by an amateur, so there are some imperfections. If you are looking for perfection, please refrain from purchasing. Thank you. Natural wood Perch Parrot Bird athletic Budgerigar