Fine 0.7 mm. Color sticks. Writes smooth, erases clean! Stick it to mistakes! Erasable! Change your mind, erase your mistakes! Delivers vivid, smooth writing. Available in vibrant, assorted shades. Write, erase and rewrite repeatedly without damaging documents. Unique, thermo-sensitive gel ink formula disappears with erasing friction. Never make a written mistake again. Guaranteed! Good Housekeeping: Since 1909. Quality tested. Limited warranty. ghseal.com for details. www.pilotpen.us. Made in Japan.