Shiny SM-2 Finger and Thumb Print Ink Pad. Pocket Thumb Print Pad. 40mm Diameter with cover. Fade & water proof, non stain ink in Black. Unique waterproof ink that won't fade away Designed for insurance and financial services and law enforcement Provides quality thumb/finger print impressions Can be re-inked. Instant dry. Black ink. A combination of porous plastic and specifically designed ink results in unique print pad. The ink removes itself very easily form your fingers. A dry or moist towelette is all that is needed.