Features: Material: The LED spinning pens are made of high grade PC material, high hardness, removable, easy to store; anti-collision and shock absorption, non-slip and wear-resistant, make its easy for yourself to turn.. Size: These pen spinning is 8.6inches 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 it can be rotated 360 degrees, professional luminous rotating pen, and also flexible fingers, and 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 Ink Color: Black/Blue/Red/Green/Purple Package Weight: approx.42g Stick Length: approx.22cm/8.66in Net Pen Length: approx.21.5cm/8.46in (More Size Detail, Please See Photo.) 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!