[Responsive Yoyo for Beginners] K2 PLUS is one of the top recommended 2 functional entry-level yo-yos. It is an excellent kids yoyo, good for beginner to practise basic string tricks 1A 3A 5A, just a gentle tug on , it will return your hand easily. [Dual Yoyo - Also Pro Unresponsive Yoyo]Yo-yo K2 is responsive yoyo (slim bearing), package attached unresponsive KK bearing. When you move to , just to change the bearing with KK bearing (attached), you will get a new Unresponsive Yoyo, no need to buy another yoyo, a good value . [Premium Quality]Made of high quality PC, beautiful crystal color, wear-resisting, pollution-free, safe for kids to use. Durable and sturdy. Perfect kids, friends, beginners, family, as Christmas Birthday gift. [IMPORTANT]1.For responsive yoyo mode, if the yo yo do not come back sensitively, it is advised to add few lubricating oil or rust-proof oil into the bearing(add the oil inside and outside of the bearing). 2.After changed to Unresponsive yoyo, it will not come back to your hand when you pull it up. You will need to learn a trick called a bind to bring the yoyo back. Body Shape: Butterfly Diameter: 55.33 mm Width: 42.67mm space Width: 4 mm Bearing: Narrow C Bearing Axle: *8mm Surface: Shining Finish Style: String Trick (1A, 3A, 5A) Response Pad: Silicon Pad (random color,don't accept the specified color.) Twist-Apart String Length: 43.31in/110cm Material:PC colour:blue Package Contents: 1 x bearing puller 5 x ball string (random color,don't accept the specified color.) 1 x storage bag 1 x10mm screw 1 x 8 ball bearing Only the above package content, other products are not included. Note: Light 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.