Sharpie Mean Streak Permanent Marking Stick, Bullet Tip, Yellow (Pack of 12) Makes permanent marks on both wet and oily surfaces  Ideal for industrial use Waterproof formula resists fading and adheres to virtually any surface with minimal smearing and fading Opaque yellow lines are easy-to-see on dark surfaces Extra-bold bullet tip creates strong, highly-visible marks Includes: 12 Yellow Mean Streak markers