Responsive Yoyo K1 . when you Pull it up, K1-Plus come with regular fating bearing Heavier than before, and have more fun without weighting rings made by ABS, Style String Trick (1A, 3A, 5A). A perfect toy for kids, friends, families, etc. Recommended for Kids Daily Practicing or Competition. If There is A String Get Stuck: 1.Remove 2.Take a look at whether the ball is loose and the two hemispheres must be tightened well 3. Attach properly.(The most important thing) size:The sphere has a diameter of 51mm and the ball has a width of 10mm. Material:ABS colour: parent + blue Package Contents: 1 * ball 1 * gloves 1 * storage bag 3 * ropes(Random color, don't accept the specified color) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.