Tresbro Alloy Aluminum Yo Yo Gift Bearing Reel StringsUnresponsive Yo -Yo Ball for Child/Kids/Boys/Girls High quality aluminum yoyofactory,Good weight to learn some yoyo tricks,release stress,enjoy sleep long time and spin time for newbies and expert. Easy to untanlge when you mess up:1.Remove the string firstly, 2.Take a look at whether the ball is loose and the two hemispheres must be tightened well, 3. Attach the string properly.(The most important thing) Great yo yo toys for all ages,will find it invigorating and challenging when you walk the dog, rock the cradle, around the world. Package:yoyo sting,yo yo ball, finger cot,cloth bag. Weight:72grams, Diameter:50mm, Width:40mm.