Gel pen with pressure push for flowing, vibrantly coloured writing results. Writing colour blue. With replaceable refill Gelion 39, line width approx. 0.4 mm. Waterproof and light resistant according to ink standard ISO 27668-2. The rubberised grip zone provides a secure hold for relaxed writing. Thanks to the clever Plug+Play system, the Gelion 1 pen can use ballpoint refills in a variety of formats.