The Frixion Ball 4 Wood, a four-color erasable ballpoint pen. The Frixion Ball 4 Wood features a sophisticated wood-grain grip, creating an adult atmosphere. This convenient four-color ballpoint pen allows you to switch between four colors with a single pen and erase and rewrite as many times as you like. Ink colors are black, red, blue, and green. The 0.5mm extra-fine tip is suitable for writing in small spaces like notebooks and documents. Product Number: LKFB-3SEF-DG Features of the Frixion Series [Feature 1] The writing disappears with temperature change! This innovative ballpoint pen is equipped with "Frixion Ink," which makes the ink colorless with temperature changes. Since "Frixion Ink" has an erasing temperature setting, the friction heat generated by rubbing the writing with the special rubber on the back of the body makes the ink colorless, allowing you to erase the writing. [Feature 2] No eraser residue. Minimal remaining marks. Unlike writing instruments that erase with an eraser, this pen makes the ink colorless with friction heat, so there is no eraser residue. Also, it leaves very few marks compared to erasing with a pencil or mechanical pencil. [Feature 3] Erasable and rewritable as many times as you like. Unlike chemical formulas like ink erasers, you can rewrite on the erased area repeatedly. [How to Use] After the writing dries, rub the rubber on the back of the shaft to erase the color. *Cannot be used for official documents or addressing envelopes.