The Pilot RFJS-GP-M Blue Medium Refill is a genuine Pilot ballpoint pen refill designed for compatible Pilot retractable ballpoint pens. Featuring smooth-flowing blue oil-based ink and a medium point, it delivers clean, consistent writing for everyday use. Ideal for note-taking, document writing, journaling, planners, and general office or school tasks, this genuine Pilot replacement refill restores your pen's original performance while extending its lifespan.