The Giant LT tuning kit for Henry's Vision and Circus diabolos increases the width by 14mm and reduces the weight by 34g. The concave hub shape aids stability during play as well as being hugely beneficial for corrections during multiple diabolo play. Less string abrasion and tweaked performance characteristics make this a preferred option for many advanced Circus users. Kit contains: steel axle, aluminium cap nuts, Vision hubs, PA washers, galvanized roller. Packaged in a smart presentation box.