A pressurised ink delivery system enables the Power Tank pens to continue writing upside down, in extreme cold (up to minus 20 degrees), on shiny surfaces, wet paper and even...
A pressurised ink delivery system enables the Power Tank pens to continue writing upside down, in extreme cold (up to minus 20 degrees), on shiny surfaces, wet paper and even...
A pressurised ink delivery system enables the Power Tank pens to continue writing upside down, in extreme cold (up to minus 20 degrees), on shiny surfaces, wet paper and even...