The ergonomic textured grip ensures lasting comfort while uni Super Ink™ technology protects against water, fading, & fraud, The perfect pen for the field, Powertank performs under the toughest conditions, Its pressurized ink cartridge allows for writing on wet surfaces, in extreme cold & at odd angles, including upside down, Ink color matches plunger color (white barrel features black ink), Point size: 1.0mm, Refillable,