This 2 color replacement pad is compatible with the Trodat 4931 and 4731 self-inking stamps. This pad contains water-based ink that is great for use around home and at the office. Choose one of our 5 standard or 6 premium ink colors when you order this replacement pad and enjoy thousands of impressions. It can even be re-inked with water-based ink for extended use. Not recommended for glossy and non-porous surfaces. Select your ink color and then click the add to cart button!