The Uni-Ball Vision Elite roller Ball pen features the Uni-flow ink system, which creates a steady flow of water-resistant ink and smooth, consistent color. The pigment-based ink forms an indelible bond to

The Uni-Ball Vision Elite roller Ball pen features the Uni-flow ink system, which creates a steady flow of water-resistant ink and smooth, consistent color. The pigment-based ink forms an indelible bond to paper, resulting in strong colors and document security. It is resistant to chemicals that can wash away dye-based inks, thus preventing check washing (a co mmon method of check fraud). The ink is acid-free, fade-resistant, and of archival quality, ideal for valuable documents. The pen is airplane-safe-a protective reservoir inside the Barrel keeps air from expanding in the ink tube, thereby preventing in-flight leaks. The sleek durable metal clip, bend-resistant stainless steel tip, and Tungsten carbide roller Ball enhance the look and performance of the pen