Set of 11 black Prockey Twin pens, fine and extra-fine. They were stored in a box of 10. Although they are new and unused, I have tested them. Please understand. How about them for art works or analog comic art materials? They are useful for detailed drawings. ◆Water-based pigment ink ◆Brand: uni ◆Model: PM-120T ◆Color: Black ◆Pen tip thickness: 0.4mm, 0.9mm ◆Quantity: Set of 11 ◆Purchase date unknown #yon4's art supplies For those who understand that these are items stored at home and the purchase date is unknown, and who don't mind. I plan to take them out of the box and pack them simply for shipping. Please understand.