This replacement pad is compatible with the Ideal 500R self-inking stamp. It features water-based ink that is great for stamping on documents, flyers, non-corrugated cardboard, envelopes and more. 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 continued use. Not recommended for glossy and non-porous surfaces. Select your ink color and then click the add to cart button!