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 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 thelps prevent the nib from drying out a pen you can rely on this fine tipped pen has a line width of approximate 03mm this pack contains 5 pens in blue black and red ink