The Hi-Tec-C gel pen provide Pilot's most precise needle-point tip which has 0.25 mm, 0.3 mm, and 0.4 mm for you to choose from. This tip technique is also applied on Pilot Hi-Tec-C Maica gel pen. You are able to take notes even in limited space on your notebooks or textbooks with its extra fine tip. The pen's gel ink is made of a special biopolymer resin whose high viscosity prevents feathering and bleed-through. The ink is also water-resistant to prevent your notes from getting ruined by water.