The Pilot Knight Ballpoint Pen Refill 1.0mm Blue is a genuine replacement refill designed for compatible Pilot Knight ballpoint pens. Filled with smooth, quick-drying oil-based blue ink, it delivers consistent, skip-free writing for everyday use. The 1.0mm medium tip produces bold, clear lines, making it ideal for note-taking, document writing, signing, and general office or school tasks. Replace your empty refill to extend the life of your favourite Pilot Knight pen while maintaining its original writing performance.