Signo: Scratch- Free Tip reduces scratching, even when writing with the pen laid flat. This allows the user to write in a more flexible position. High-quality finish with a metal clip and ergonomically-designed rubber grip, By improving the unstable factors of the conventional gel ink, we have further improved our ink’s stability and durability. Specification:UM 100: Vivid 15 colors, Smooth writing. Stainless Steel Tip, 0.7mm tungsten carbide ball, Plastic(AS) barrel. SIGNO UM-100 Gel Pen (Gold Ink, Pack Of 6)