This 2 color replacement pad is compatible with the Trodat 4750 self-inking stamp. It uses water-based ink which works great on documents, posters, non-corrugated cardboard, invitations and more. Choose one of our 5 standard or 6 premium ink colors when you order this and enjoy thousands of vibrant impressions. It can 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!