With just a light touch, deliver clean and crisp lines with the water-resistant pigment ink of the Uni-ball Eye Roller Ball Pen! You can write smoothly using its stainless steel tip and consistent ink flow. Don’t worry about not knowing when the ink will run out. There is a window built into the pen so you know exactly how much ink you have left! Until that last drop of ink, you can be confident that your lines stay solid with the vivid color you expect from Uni-ball.