DescriptionMade of high-quality plastic material. This set of simple fountain pens refills is easy to use and change, you can replace or fill you pen conveniently, and the sufficient quantity will satisfy you various needs. Liquid ink is smooth flowing, leaves a solid, confident line, and adds to the sophisticated experience of fountain pen use.Features-Material: Plastic-Size: About 5.00X0.60X0.60cm/1.97X0.24X0.24inch -Quickly and easily refill your fountain pen with these ink cartridges. -This fountain pen refill can help pens slide smoothly on the paper, and you can write fluently and the replace the ink cartridge can you to save much trouble. -Perfect for as a wonderful gift for your friend, family, lover and partner. -Made from premium plastic material, so it can use for a longer time. -Practical function and fine workmanship, make it more fashionable among students.