Elevate your note-taking with our invisible ink pen refills. Designed for privacy, these refills reveal their secrets only under specific conditions, ensuring your information remains protected. The precision craftsmanship keeps a seamless writing experience, while the clear marking capabilities make them ideal for discreet communication. Features -Color:Multi -Material:Plastic -Size:13.50X0.50X0.50cm/5.31X0.20X0.20in -Light- : This reacts to light, making it ideal for drawing attention to important text in a unique way - Messaging: Write messages that remain invisible to the naked eye and only reveal themselves under light -Consistent Flow: Enjoy a smooth and seamless writing experience with refills that ensure a consistent flow of ink every time - Materials: Crafted materials, these refills are designed to be and withstand regular, everyday use -Multipurpose Use: Versatile and multip, these refills are ideal for everything from taking notes to highlighting key points in documents Package list: 10 x invisible pen refills