The erasable pen is perfect for school use, as it features an eraser on the top of the pen that makes it easy to erase what you've written. Sometimes you can't help but forget or lose the eraser, then the pen is needed to correct your mistakes. The pens have an elegant design with precise tips, making them easy to write with. The ink is quick-drying and sensitive to temperature changes, so it should not be used if you are signing important documents. The set consists of 4 pens in different colors, each pen representing an animal that the product's user will surely appreciate. The pens are extremely useful for taking notes as you can easily remove a simple mistake with the removable top. The animals on the pens are a pig, a panda, a mouse, and a teddy bear, which will encourage users to start writing and drawing. Thus, learning through play! The pens have a blue/black ink cartridge. This is a great solution for children who are used to pens in class and now need to learn to use pens. The writing line thickness is 0.35 millimeters. An erasable pen is definitely a good solution as it does not leave full traces. Specifications: Color: Gray, White, Pink, and Navy Blue Writing Color: Blue/Black Writing Thickness: 0.35mm Dimensions: See image Package weight: 39g Pen weight: 8g