Rare, Discontinued KUMON This is an old-style grading pen made to Kumon specifications. Includes cartridge and tip. Please consider purchasing only if you understand that this item has been stored at home. A small part of the ink replacement is chipped. Please check the photos. Regarding the included ink, unopened items and those whose usability cannot be confirmed may rarely have initial defects or ink deterioration. The ink set and check have been performed once. Please note that we do not accept returns or exchanges to prevent replacement, even if there is a defect.