suitable for ballpoint pens, these ballpoint pen refills are easy to install and replace. Simply twist your pen to remove the old refill and insert the new one. These refills are compatible with a variety of pen models, making them a versatile addition to your stationery collection. Keep your favorite pens in use with these refills. Features -Color:Blue -Material:Metal -Size:11.60X0.53X0.53cm/4.56X0.21X0.21in -Sturdy metal design: the metal construction of these refills ensures they are both lightweight and , ideal for frequent use -Effortless writing: experience smooth and effortless writing with ink that dries quickly, preventing smudges and smears -Wide compatibility: these refills are compatible with many ballpoint pens, making them a versatile addition to your stationery supplies -Multipurpose use: suitable for use in various settings such as the office, school, business, and home, meeting all your writing needs -Shareable convenience: these refills are suitable for personal use or sharing with friends, offering convenience and practicality Package list: 50pcs pen refill