DetailsInk Refill Cartridge for use in Three Designing Women personalized stampers. Interchangeable square ink refill cartridges to fit in the square stamps. Choose to interchange different colored ink refill cartridges into your stamp for a custom look. The ink refills easily snap into your stamp, so changing colors is a breeze. It's fun to use a variety of these beautifully-colored inks! Try some new colors today. These water-based inks last 800-1,000 impressions.