The ever popular uni-ball Eye pen features a unique controlled ink flow system ensuring a smooth writing performance right down to the last drop. The waterproof ink resists fading and smudging and a visible ink window lets you know at a glance how much ink is left. Stainless steel tip provides quality writing and helps prevent the nib from drying out. This pack contains 5 liquid ink rollerball pens in blue, black and red ink. These are quality pens you can truly rely on. Fine 0.5 mm line width.