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 and erase repeatedly. Ink colors are black, red, blue, and green. The 0.5mm extra-fine tip is suitable for writing in small spaces like planners and documents. Product Number: LKFB-3SEF-B Features of the Frixion Series [Feature 1] The writing disappears with temperature changes! This innovative ballpoint pen is equipped with "Frixion Ink," which makes the ink colorless with temperature changes. The "Frixion Ink" has an erasing temperature setting, so the friction heat generated by rubbing the writing with the special rubber on the back of the pen body makes the ink colorless, erasing the writing. [Feature 2] No eraser residue. Minimal remaining marks. Unlike writing instruments that erase with an eraser, this pen uses friction heat to make the ink colorless, 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. Unlike chemical formulas like ink erasers, you can rewrite on the erased area repeatedly. [How to Use] After the writing dries, rub the writing with the rubber on the back of the pen to erase the color. *Cannot be used for official documents or addressing envelopes.