Whether you're in the classroom or , these fountain pen ink refills are an essential supply for students. Just insert a refill into your pen, and experience the convenience of a direct liquid ink replacement. Features - Color: Red -Material:Plastic - Size: 5.00X0.50X0.50cm/1.97X0.20X0.20in -Inner Diameter:3.4mm -Ink Color:Red -Note: Not Erasable -Good compatibility: designed for most fountain pens, these ink refills ensure a good fit and reliable performance, enhancing your writing experience -Generous pack: each pack includes large quantities of pen ink refills, providing a substantial supply that meets your daily writing and replacement needs, ideal for students and professionals -Optimal performance: these ink refills effectively enhance the functionality of your fountain pen, delivering smooth and consistent ink flow for an optimal writing experience -Convenient to use: simple and easy to replace, these ink refills offer a quick and good solution for your writing needs, good for use -Elegant appearance: the sleek and minimalist design of the ink refills adds a touch of elegance to your fountain pen, enhancing its overall look and feel Package list: Fountain Pen Ink Refills