Ballpoint Pen Refill Set You will get 10 pieces of black Ink ballpoint pen refills; Sufficient quantity to meet your different office or school use and replacement, and you can share them with your friends, classmates and colleagues. 1mm Pen Refillseach ink pen refill measures 11.5 cm/ 4.5 inch in length, 1.0 mm medium point for smooth writing; You just need to install it on a suitable ballpoint pen, please check the length before ordering. Metal MaterialThe shell of the pen replacement refill is made of quality metal, the ink inside is also made of quality material, with high color rendering and flows evenly, so the entire pen refill is very durable, allowing you to write smoothly on paper. Smooth Design this 1.0 mm ballpoint pen refills allows you to draw or write clear lines, and the ink flows evenly, which can meet most of your drawing and writing needs; Furthermore, the ink refill is not easy to fade or skip that you can write smoothly, and your calligraphy work can last a long time without fade. Wide Application Metal ballpoint pen refills are suitable for school, office, and home. Ideal for writing, journaling, note-taking, underlying, sketching, and more. They are also non-toxic and acid-free. A perfect choice for your everyday use.