thenshop retractable gel ink pens black ink ballpoint pens 0.5 mm fine point writing pens 6 colors retractable roller pens for school office supplies students stationery (18 pieces) thenshop features: retractable ballpoint pen cases are made of durable plastic, sturdy construction makes the pen not easy to break or deform. retractable ballpoint pens have glossy finish for a delicate touch, the pen tip slides smoothly on the paper, ink flows evenly and dries quickly. they are suitable for office, schools, home, business, you can choose such practical pens as gifts for people you loved. each black ink pen with metallic clip is lightweight and straight, easy for you to carry and store, will not take up too much space, it can help you note important information in time. specifications: material: plastic color: black, purple, blue, green, pink and white size: as shown in pictures package includes: 18 x retractable gel ink pens notes: manual measurement, please allow slight errors on size. the color may exist slight difference due to different screen display.