Uni-Ball One P x Sanrio 0.5 Limited Edition Gel PenUniball x Sanrio's new gel pen is a perfect portable pen that's easy to put in your bag! Cuteness is definitely not its only advantage. The Uni ball One P is not only easy to hold, but also offers smooth ink flow, and its metal nib provides stability. The matte, candy colored body comes with a clip for easy attachment to a pocket or notebook. It's a chubby pen that scores full marks in both appearance and practicality. Ink Color: Black Nib Size: 0.