- Quick drying ink - dries within 5 seconds on most surfaces, eliminating smudges. - Waterproof - for writing in wet, greasy and gritty conditions. - 1mm Bullet Nibs - fine bullet nib design - Premium quality acrylic nib - non-toxic, low odour, job site ready. - Permanent - indelible ink for writing permanently or semi-permanently on a wide variety of surfaces. - Pack of 4 colours - Black, Red, Green, Blue.