The weight reduction axle for Sundia diabolos is a great accessory for those who want to reduce the weight of their diabolo by 15 grams. This axle is easy to install and is sure to make your diabolo feel more agile and responsive. Whether you're looking to improve your performance or just want a lighter diabolo for easier tricks, the weight reduction axle is a great choice. It is compatible with Sundia diabolos and is sure to become a valuable addition to your diabolo setup.