Tombow ULTRA, Premium Design Roller Ball Pen, Midnight Blue (55073) Awarded numerous international design awards for high quality and design Combines exquisite finishes, contemporary design, generous barrel and comfort grip Waterproof, fast-drying pigment ink - won't smear, skip or fade Premium Tungsten cartridge - Black Ink, Medium point, 0.5mm Refillable with all Tombow ROLL Pen Refills