Discover the writing tool with our light- pen refills. These refills offer a high-brightness fluorescent effect, making important information stand out under light. ideal for highlighting key points, these refills ensure your notes are and visible. The smooth writing experience and ink make them a must-have for any stationery collection. Features -Color:Multi -Material:Plastic -Size:13.50X0.50X0.50cm/5.31X0.20X0.20in -Glowing Ink: The ink in these refills glows under light, making your highlighted text pop and ensuring points are easily noticed -Invisible Security: Specially formulated ink remains invisible until exposed to certain conditions, keeping your private notes secure and hidden -Smooth Writing: Designed for a seamless writing experience, these refills glide smoothly on paper without any annoying interruptions - Construction: Each refill is crafted with precision, ensuring they are and of the quality for use - Use: Ideal for variety of tasks, these refills are great for highlighting, underlining, and taking notes efficiently Package list: 10 x invisible pen refills