Discover max writing length, max precision, and max smoothness with the Reynolds Trimax Gel Pen. These gel ink pens have a refillable fluid ink system for a smooth writing experience. They come with a fine 0.5 mm tip to give you incredible precision whether you're writing or illustrating. Plus, the waterproof ink keeps your work safe from spills. The Trimax Gel Pen also comes in a stylish, pocketable design, so you can write as you go.