Frixion Ball 4 Wood 0.5mm Dark Green Pilot LKFB-3SEF-DG You can erase the ink by rubbing the writing with the special rubber. This generates friction heat, allowing you to erase without producing eraser shavings, and rewrite as many times as you like. *Cannot be used for official documents or addressing envelopes. ● Specifications: Slide lever type 4-color ballpoint pen ● Body color: Dark Green ● Grip: Rubber ● Ink colors: Black, Red, Blue, Green ● Frixion ink (water-based gel) ● Ball diameter: 0.5mm ● Length: 145mm Although it is new, it has been stored at home, so there may be scratches on the box. Please only purchase if you understand and accept the condition shown in the photos.