The StarBird Bamboolie is a fantastic, multi-purpose product that is made of natural bamboo trunks that have been filled with various fibers. The trunk is wrapped with abaca rope so that you can hang the Bamboolie horizontally for good footing or hang it vertically as a climbing post. Each bamboo segment has one hole. The piece in the photo is 2 segments long and has two holes. The second hole is on the other side. Your bird will love the challenge of climbing and pulling out the different fibers that you can easily refill with our packs of sea grass, abaca, or coconut fibers, or even paper if that's what your bird loves to chew. The Bamboolie is a beautiful, intriguing and extraordinary enrichment toy for your bird to enjoy for years to come. The trunks vary in diameter from about 4 to 6 inches.