Features: Material: The LED spinning pens are made of PC and Silicone material, high hardness, removable, easy to store; anti-collision and shock absorption, non-slip and wear-resistant, make it easy for you to turn.. Size: These pen spinning is 8.4 inches in length, the two ends of the rotating pen are cleverly designed with heavy hammers on both sides to increase the turning force and enhancing the dynamical balance. Easy to use: The finger rotating pen adopts symmetrical axis designs and can be rotated 360 degrees, professional rotating pen, with pen refills, flexible fingers, bring out the vigour of the brain. Wide applications: These pen spinning can exercise the flexibility of fingers, suitable for children and adults to exercise their brains while having fun and relaxing, improve attention, memory and learning ability. Nice Gift Choice: Long-term use of rotating pen can effectively improve hand flexibility, reduce anxiety and reduce stress. This pen is good for office workers and students as a great tool to relieve your anxiety. Specifications: Material: PC/Silicone Color: As The Picture Shows Style Options: 3 Style are Available as Shown in the Picture. Package Weight: approx.22g Length: approx.21.3cm/8.38in Package Includes: 1Pc x Rotating Pen(Not Incloded Refills.) note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the differences between different monitors, the picture may not reflect the actual color of the item. Thanks!