Ballpoint Pen Refill Set You will receive 10 pieces of black ink ballpoint pen refills; Sufficient quantity to meet your various office or school use and replacement needs, and you can share them with your friends, classmates, and colleagues. 1mm Pen Refills each ink pen refill measures 11.5 cm/4.5 inches 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 Material The 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 smoothly, so the entire pen refill is very durable, allowing you to write smoothly on paper. Smooth Design these 1.0 mm ballpoint pen refills allow you to draw or write clear lines, and the ink flows smoothly, which can meet most of your drawing and writing needs; In addition, the ink refill is not easy to fade or skip so you can write smoothly, and your calligraphy work can last a long time without fading. Wide Application Metal ballpoint pen refills are suitable for school, office, and home. Perfect for writing, journaling, note-taking, underlining, sketching, and more. They are also non-toxic and acid-free. A perfect choice for your daily use.