[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 beginners to practice basic string tricks 1A 3A 5A. With just a gentle tug, it will return to your hand easily. [Dual Yoyo - Also Pro Unresponsive Yoyo] Yo-yo K2 is a responsive yoyo (slim bearing), and the package includes an unresponsive KK bearing. When you are ready to advance, simply change the bearing to the included KK bearing, and you will have an unresponsive yoyo. No need to buy another yoyo, offering great value. [Premium Quality] Made of high quality PC, featuring a beautiful crystal color, wear-resistant, pollution-free, and safe for kids to use. Durable and sturdy. Ideal for kids, friends, beginners, and family as a Christmas or birthday gift. [IMPORTANT] 1. For responsive yoyo mode, if the yoyo does not return sensitively, it is advised to add a small amount of lubricating oil or rust-proof oil into the bearing (apply oil inside and outside the bearing). 2. After changing to unresponsive mode, the yoyo will not return to your hand when pulled. You will need to learn a trick called a bind to bring the yoyo back. Body Shape: Butterfly Diameter: 55.33 mm Width: 42.67 mm Gap Width: 4 mm Bearing: Narrow C Bearing Axle: 8 mm Surface: Shining Finish Style: String Trick (1A, 3A, 5A) Response Pad: Silicon Pad (random color, specific color not guaranteed) Twist-Apart String Length: 43.31 in / 110 cm Material: PC Color: Green Package Contents: 1 x bearing puller 5 x ball string (random color, specific color not guaranteed) 1 x storage bag 1 x 10 mm screw 1 x 8 mm 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 to be slightly different from the real thing. Measurement may vary by +/- 1-3 cm.