Package List: 4 x 19cm Spinning Rotating Pens Specification: 0.5mm Black Ink Refill Material: Alloy Steel + Plastic + Rubber Color: Blue, Purple, Red, Green Size: Each pen is 19 x 1.5cm/7.48 x 0.59 inch long Features: Premium Material: The two ends of the pen spinning pens are made of anti-collision, non-slip, wear-resistant, and pressure-resistant rubber nibs. The pen barrel is made of elastic plastic material, durable and sturdy and can be used for a long time. Use Function: Our spinning pen for spinning is a good choice to pass the boring time and can exercise your brain and learning ability at the same time. Nice Gift Choice: Our rotary pen is very suitable for students and office staff. Playing with the rotary pen can relieve pressure and adjust the mood. It is a nice gift for students and office staff.