Features: Reliable material, the rotating pen is symmetric design, the pen barrel is made of pc, and the dynamic balances support rings is made of alloy, which is reliable and can be applied for a long time. More stable, this spinner pen is about 22.3cm/ 8.38inches long, which is long enough for you to use; and both ends of the pen are embedded with metal tip for counterweight, which makes it easier for you to turn the pen. Stress reliever toy,the pen spinning mod is suitable for both children and adults; you can use this pen to train your hands, eyes and cerebellum, so you can improve your concentration, memory and learning ability; it can also help you relieve the pressure of work and life. Nice gift choice,you can give these gaming finger pens as gifts to your friends, relatives, colleagues, classmates on thanksgiving, christmas, new year, birthday, etc, to show your care. There are 5 colors optional ,you can choice follow your need. Specifications: Pen Barrel Material:PC Color:Black,Blue,Red,Green,Purple Package Includes: 1 Piece Spinning Rotating Pen note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the picture may not reflect the actual color of the item.