The Cross Slim Blue Ballpoint Pen Refill, medium point (M), was developed specifically for the slimmer and more compact Cross brand ballpoint pens. Manufactured to the brand's usual quality standards, it guarantees quick-drying ink and consistent flow, preventing smudges and skips during writing. It's a practical way to keep your Slim ballpoint pens always ready to use without needing to replace them, extending their lifespan. Blue is the most commonly used color in everyday school and professional life, suitable for note-taking and daily correspondence.