The Pilot RFJS-GP-F Red Fine Refill is a genuine Pilot replacement refill designed for compatible Pilot retractable ballpoint pens. Filled with vibrant red oil-based ink, it delivers smooth, precise writing with crisp, consistent lines through its fine point. Perfect for editing, proofreading, marking, detailed note-taking, journaling, and everyday office or school use, this genuine Pilot refill restores your pen's original writing performance while extending its lifespan.