Carter's 3.15" x 6.12" Micropore stamp pads are pre-filled with bold black ink and are perfect ink pads for stamping. The custom Micropore design is built to last longer in one use than traditional foam and felt pads. No refills or reinkers are required. Filled with a lasting permanent ink that can be used on paper, wood, fabric and more. ACMI AP-certified as non-toxic and confirming to ASTM D 4236, feel free to use this ink in schools, offices and homes while staying safe.