Stic Pens Ltd offers Ball Pen with Lower- viscosity Water-proof and Smear-proof Ink. Stic Pens Ltd also manufactures various types of ball pens, fine-liners, sketch pens, markers, hi-lighters etc. The Ball Pen with Lower- viscosity Water-proof and Smear-proof Ink, also known as Sonic Ball Pen, has specially formulated writing system for smooth, vivid and goop-free writing. The Ball Pen with Lower- viscosity Water-proof and Smear-proof Ink has 0.5 mm tungsten carbide ball and is refillable. This Ball Pen is available in blue, black and red ink colour.