The Axl is an aluminum ball-bearing transaxle yo-yo. It is an amazing sleeper, and can be used as a looper. It's an excellent value for those wanting to experiment with the world of quality high-performance aluminum yo-yos. It uses replacable custom performance rings for improved responsiveness and is available in a variety of colors. For those looking for a unique gift item, it's also possible to laser engrave a name or word on this product; call for details. Because we receive so many different colors of this yo-yo in such small quantities we cannot offer a color choice. However if you'd like to request a color, your more than welcome to. In 2008 Custom changed their bearing size to A. If you have an older Custom yo-yo you may need the old I bearing size.