These are jewel box divider cards! Our divider cards are professional heavy duty store grade divider cards. They are made of 100% virgin High Impact Polystyrene (H.I.P.). They are strong stuff! These cards are rectangles with rounded corners (it eliminates jabbing yourself on the sharp corners!) White is perfect for labeling with a sharpie - make a mistake and simply scratch it out with a razor blade or some scissors.
These dividers are reusable - if you don't need that section anymore, just turn it around or turn it over!