The Universal UNV39912 Gel Pens in black ink are medium-sized rollerball pens that come in a box of 12. These high-quality gel pens are designed for smooth and consistent writing or drawing, making them ideal for various office and creative tasks. The rollerball design ensures a steady flow of ink, while the medium tip size provides a comfortable writing experience. With the trusted Universal brand and reliable performance, these gel pens are a great addition to any pen collection.