Add years of use to stamps with this Offistamp blue pre-inked stamp refill ink. Refresh dry pre-inked stamps with this bright blue refill ink to make thousands more impressions. This Offistamp 0.33-ounce refill ink features an oil-based formula that spreads evenly across pads, ensuring crisp, clear impressions with every use. Ink refill is ideal for self-inking and traditional stamp pads. Blue ink refill. Oil-based formula