The UB-187S features the Uni-Flow System, ensuring smooth writing performance to the last drop of ink. The 0.7mm stainless steel needle point nib writes a 0.5mm fine line and is bend resistant. Uni's high quality "Super Ink" is not only water and light resistant, but also "Tamper-Resistant", meaning the ink cannot be washed off using chemicals and solutions. Great for official documents.
