Our black ink metal pen refills are practical for maintaining the performance of your favorite writing instruments. Designed for use in twist pens, click pens, and beadable pens, these refills offer a seamless writing experience. To replace the refill, unscrew the pen, remove the old refill, and insert the new one, ensuring your pen continues to deliver sturdy writing. Features -Color:Black -Material:Metal -Size:11.60X0.53X0.53cm/4.56X0.21X0.21in -Sturdy metal body: the pen refills are made from sturdy metal, ensuring a lightweight yet writing tool that stands the test of time -Effortless writing: enjoy a smooth and consistent writing experience with quickdrying ink that prevents smudging and ensures clean lines -Wide compatibility: these refills are designed to fit a variety of ballpoint pens, offering flexibility and convenience for replacing old or empty refills -Versatile usage: suitable for use in offices, schools, businesses, and homes, these refills meet all your writing requirements -Practical for sharing: these pen refills are ideal for personal use or sharing with friends and colleagues, providing a dependable writing solution for everyone Package list: 5 pcs x 50pcs x ballpoint pen refills