Sundia fire diabolo handsticks. They are designed by Sundia to be used especially with this diabolo. The stick shafts are made from aluminium and the handles from a soft, grippy material - this prevents them overheating and keeps your hands safe. The 'string' is this case is made from intertwined metal wire which last much longer than conventional string and can withstand higher temperatures - obviopusly due to the nature of this material some string-orientated tricks are no longer possible. The size of the handsticks are 31cm.