The Pilot G-Tec pen has a microtip rollerball measuring 0.4mm, with a stroke width of 0.2mm. This refillable pen features a bio-polymer ink that prevents blurring and provides smooth writing everytime. With its ultrafine tip, it's the ideal rollerpen for any application where fine, precise writing is required. The crystal-clear barrel allows you to see when it's time to refill. Available in blue or black ink.