【Brand New, Unopened, Unused】【Unused】 TDK Logo Pilot Frixion Ballpoint Pen Black x 6, Blue x 8 (I don't know the ink color) Since it's Frixion, you can erase the written letters by rubbing them with the rubber at the back of the pen. It has a clip, so you can attach it to your pocket, etc., which is good for preventing it from falling. Please consider it. Thank you for looking.