One of the best gel ink ballpoint pens is the G-TEC-C 0.25. The G-TEC-C integrates two cutting-edge technologies: biopolymer gel ink and the ultrafine Hi-tecpoint. with a tungsten carbide ball that is incredibly durable, resilient, and holds its shape. Efficiency and comfort when writing are made possible by the Pilot gel ink's exceptional fluidity and ultra-softness. Pen with a stopper. Size of tip: 0.25 mm