Pilot Frixion Ball Slim 038 Ballpoint Pen, Red Erasable Ballpoint Pen LFBS-18UFR It is equipped with a re-transfection ink that can be the color of the ink changes to colorless, turn off the handwriting If rubbing, erasing Lover! It is a convenient knock-type ball-point pen equipped with a ball diameter of about 0.38mm of ultra-fine. Storability / convenience is up a slim body! Simple knock is possible to slide the small knob Since erasable to write finely, making it ideal for learning and for notebooks.