Pilot Frixion Ball 2 Biz Refill 2 packs total of 4 refills (Extra Fine) 0.5mm Blue, 2-pack (LFTRF40EF-2L),

Nib: Extra fine 0.5mm / Barrel: Stainless steel + resin Refill size: Total length: 87.5mm, Maximum diameter: 3.6mm *Please be sure to store unused refills in their original packaging. Features of the Frixion Series: [Feature 1] Ink becomes transparent with temperature changes! This is a new concept ballpoint pen equipped with "Frixion ink" that becomes colorless with temperature changes. Since "Frixion ink" has a set decolorization temperature, the friction heat generated by rubbing the ink with the special rubber at the back of the body makes the ink colorless, allowing you to erase the writing. [Feature 2] No eraser residue. Minimal erasing residue. Unlike writing instruments that use erasers, it makes the ink colorless with friction heat, so no eraser residue is produced. Another feature is that there is very little erasing residue compared to the erased marks of pencils and mechanical pencils. [Feature 3] Can be written and erased any number of times. Unlike chemical formulas such as ink erasing fluids, you can write repeatedly on the erased area. [How to use] After the ink has dried, rub it with the rubber at the back of the barrel to erase the color. *Frixion is an erasable writing instrument. Do not use it on documents or addresses that should not be erased.