AcroBall Pro Pen contains an innovative advanced ink for out-of-the-ordinary writing flow and smoothness as well as effortless, smear-proof performance. The ink writes smooth like gel, but dries quickly like a ballpoint. Retractable AcroBall is equipped with an ergonomic grip so that it can be held well in the hand. The tungsten carbide nib cannot be deformed and will not wear out. Refillable ballpoint pen also features a 1.0mm point and silver barrel.