1. Compatibility with Pilot FiXion: Specially designed for Pilot FiXion Ball Clicker pens, these blue 0.7mm leads ensure flawless compatibility. Enjoy smooth and uninterrupted writing, suitable for all your writing projects, whether private or business. 2. Higher ink volume for more writing: With 80% more ink than traditional refills, each refill gives you up to 400 meters of writing time. Ideal for frequent users, students, and professionals who need longer writing sessions. 3. PRECISION BALL TIPEquipped with a quality ball tip from Japan, these refills guarantee sharp and precise writing. The ink dries quickly, prevents smudging, and makes these refills for both right and lefthanded users. 4. Thermosensitive Erasable Ink: The unique thermosensitive ink allows you to erase your writing simply by applying heat, without damaging the paper. for quick corrections, this feature makes our refills ideal for exams, notes, and official documents. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.