Traditional style one sided Chinese Yo-Yo which makes a humming noise when spinning fast. Plastic disc with holographic sticker, counter weighted axle piece with a brass centre & point for top spinning on the floor / hand etc. Weight = 240g Diameter = 120mm This model has a balanced weight so it will stay straight rather than turn like some other one sided diabolos. The point can also be used as an axle where the diabolo will turn