Description Our refillable fountain pen ink refillsare designed for a seamless writing experience. These ink refills are compatible with pens that have a 3.4mm diameter, ensuring a suitable fit. The erasable ink feature allows for corrections, making it ideal for journaling, note-taking, and professional writing. Enjoy smooth, uninterrupted writing with our durable ink supplies. Features - Color: Black -Material:Plastic - Size: 5.00X0.70X0.70cm/1.97X0.28X0.28in -Quick drying: dries in just a few seconds, ensuring your important writing moments are not marred by smudges -Heat erasable design: features a heat erasable design, allowing you to easily correct mistakes and improve writing efficiency -Replaceable ink refills: the ink refills are replaceable, making it convenient for long term use -Wide compatibility: suitable for fountain pens with a 3.4 mm diameter, offering broad applicability -Smooth ink flow: enjoy a smooth and consistent writing experience as your pen glides elegantly across the paperPackage list: 100pcs Pen Ink refills