These ink refills are designed to fit most standard fountain pens, making them a versatile choice for students. The compact size and lightweight also makes it easy to transport them. Replace your pen's ink refill effortlessly and enjoy a seamless writing experience. Features -Color:Black -Material:Plastic -Size:5.00X0.50X0.50cm/1.97X0.20X0.20in -Inner Diameter:3.4mm -Ink Color:Black -Note: Not Erasable -Proper fit: specifically designed for replaceable ink refill fountain pens, ensuring a precise and secure fit for optimal writing performance -Bulk supply: providing a supply that meets your daily writing and replacement needs, good for students and professionals -Enhanced functionality: these ink refills are smooth and consistent ink flow, maximizing the performance of your fountain pen -User-friendly: easy to replace and use, these ink refills offer a quick and efficient solution for your writing needs, ideal for those with busy schedules -Stylish design: the simple and elegant design of the ink refills complements the aesthetic of any fountain pen, adding a touch of sophistication to your writing tools Package list: Fountain Pen Ink Refills