The Lumos Pro Duo Refillable Multi-Tip Pen is a versatile tool that includes 9 professional artist's tips and 2 writing tips. Many pens and their refills are designed to be disposable, leading to constant replacement purchases. As a product designer and craftsman with 6 years of experience in creating calligraphy and fountain pens, Tom understands the frustration of having to constantly purchase new pens or refills. That's why he designed this pen to be infinitely refillable, reducing waste and promoting creativity. The Lumos Pro comes with a full creative tip set of 11 tips, a silicon grip for changing tips, a how-to guide and a small bottle of ink to get you started. **The Lumos comes with a full set of 11 nibs:** * Fineliner: 0.1, 0.2, 0.3, 0.5, 0.8, 1.0 * Felt-Tip: Chisel, bullet & brush * Writing: 0.3, 0.5 **What ink can I use?** The Lumos is compatible with dye-based Fountain Pen Inks, so long as they don’t contain particles (such as shimmer inks) or binders (like acrylic or shel