The Pilot BLS-G1-7 Black Refill is a genuine Pilot gel pen refill designed for compatible Pilot G1 gel pens. Featuring rich black gel ink and a 0.7mm medium tip, it delivers exceptionally smooth, consistent writing with crisp, bold lines. Ideal for document writing, note-taking, journaling, signatures, and everyday office or school use, this genuine Pilot refill restores your pen's original writing performance while extending its lifespan.