This replacement pad is compatible with the Shiny S-520 self-inking stamp. It uses water-based ink and stamps great on documents, flyers, non-corrugated cardboard, envelopes, and more. Choose from 11 ink colors when you order this replacement pad and enjoy thousands of vibrant 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!