ENDLESSLY REUSABLE: You can switch contents for your labels whenever you need. A mere wipe of a wet paper towel will remove the finished ink on the label holders easily and you are ready to label another thing! Alternatively, you may write or print on the 20 white cards!SET INCLUDES: 6 white metal clip on label holders (3 1/2'' x 2 1/2" each), 20 White cards (3 1/2'' x 2 1/5" each) and 1 wet-erase black marker.METAL LABEL HOLDERS: These clip-on label holders easily and securely fit on storage bins, fabric storage bins, baskets and boxes up to 1/2'' thickness. They are reusable and can be repositioned to label or organize your pantry, classroom or kitchen.BLACK WET-ERASE MARKER: Erasable, dustless and non-toxic formula is both eco-friendly and safe for use at home.Guarantee: We are so confident that our metal label holders will MAKE YOUR LIFE EASIER.