Periodic Table of Elements is an educational poster showing an in-depth periodic table of elements for all to learn. All posters are pre-printed on a thin, glossy paper. If rolled is chosen, your poster(s) will be rolled into a plastic sleeve. If flat is selected, then your poster(s) will be shipped out flat between corrugated cardboard. We take pride in the quality of all our products and strive to give our customers the best wall art possible!