Released to celebrate the 20th anniversary of Uni-Ball Eye pens, the Eye Designer is based on a pen that has been a favorite of many for over 10 years, the venerable UB-157. High-quality and reliable rollerball featuring waterproof pigment ink and 'Uni-Flow' system to ensure a continuous consistent write to the last drop. Stainless-steel tip with tungsten carbide ball. 0.7mm ball writes a 0.5mm line. The uni-ball Eye Designer contains uni Super Ink, which is fade resistant, water resistant and tamper proof. A stainless steel tip.