Uni-Ball Eye 157 liquid ink rollerball pens with a fine tip to produce a medium line of 0.5 mm. The ever popular Uni-Ball pen features a unique controlled 'ink-flow system' ensures smooth writing performance right down to the last drop. The waterproof ink resists fading & smudging & a visible ink window lets you know at a glance how much ink is left. Stainless steel tip provides quality writing & thelps prevent the nib from drying out. Features a tamper proof uni Super Ink that will not wash off when immersed in water acetone glycerin bleach or other chemicals used by document fraudsters. This pack contains 2 black 2 blue & 1 red ink pen.