T-shaped perch. Commercially available perches are easily chewed up and become tattered, but this one is made of very hard wood, so it's durable (Japanese Zelkova). Suitable for cockatiels. Made with wood that is safe to eat. No nails are used. Made to fit the HOEI T-shaped perch holder (12mm diameter). Please note that the holder is not included. Returns and exchanges are not accepted. Thank you for your understanding.