Gel pens have the advantages of both fountain pens and oil-based ballpoint pens. The writing feels comfortable, the viscosity of the ink is low, and an appropriate lubricant is added. The viscosity of the writing medium is between water and oil, so it is smoother than ordinary oil-based ballpoint pens. An upgraded product of the oil-based ballpoint pen. features: Comfortable writing feel, low ink viscosity and good lubricity