The Uniball Signo Gel Pen is the perfect ballpoint pen for anyone with a bold writing style. It is filled with gel ink that is super smooth, and has a vivid pigment that will stand out from the rest. The gel ink is an advanced Uni-Ball Super Ink, an ink formula that bonds to paper fibers. It is resistant to chemicals that wash dye-based ink from checks. Super ink is also fade resistant, water resistant, and acid free. This vibrant gel ink doesn't skip or stutter, even on glossy paper, and gives bold, easy to read lines. The broad 0.6mm writing line is ideal for anyone with large handwriting style. The rubber grip makes this pen comfortable and easy to write with, and a capped top stays put and ensures that this pen will never leak in your pocket. Black Ink in a Box of 12.