Items listed until April 3rd Usable for adults and children alike Safe because the parts don't come apart Ink (refill)/intensity: Oil-based Body material: Plastic Other features: Bulk sale Individual sales also possible Please comment Also for gifts and work All ink is black All new Skeleton body For those who don't like ballpoint pens Easy to hold for those more accustomed to pencils (That's the impression) Tested and confirmed that all can write For those who find the bottom part of their ballpoint pen comes off and can't concentrate on writing The skeleton body type is the type that doesn't come off Things that don't come off help with studying And you can concentrate on creating documents Ballpoint pens that make work easier For those who have a lot of things in their pen case and the bottom of their ballpoint pens come off easily (Recommended for boys and those who handle things roughly, or those who often find the bottom part coming off?)