Blue Power Tank Pen
BEST SELLER. The Power tank brand is well know for it's performance in any weather conditions, so it made sense that we chose it as our preferred brand. A brilliant Pen, will work in any type of weather conditions, it even works under water. Highly recommended. A pressurized 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 underwater. A perfect match for your Re-writable cards.