Ti SunbirdThe Titanium Sunbird follows the tradition of the hummingbird yoyo series, with high speed, acceleration, and power. It features a 0. 5mm thin wall, a lot of rim weight, some of the never before seen titanium colorways, all made possible by our incredible manufacturing prowess. We hope the Ti Sunbird will enhance your titanium yoyo experience. Weight 64. 15grams Material Titanium Diameter 55. 92mm Width 43. 78mm Gap width 4. 4mm Axle M4*8mm Bearing