These high-quality black ink pen refills are perfect for anyone who values smooth and consistent writing. Each pack includes 20 refills, each with a 0.5mm medium tip, offering precision and comfort with every stroke. Designed for replaceable pens, they are compatible with most standard pen models, making it easy to keep your favorite pens in use. Whether you're at work, school, or home, these refills ensure a flawless writing experience. The rich black ink is quick-drying, smudge-resistant, and delivers bold, clear lines every time. Ideal for everyday use, these refills provide an economical solution for your writing needs.