BEWITU Periodic Table with Real Elements Inside There are two sizes of periodic table of elements to choose. The large size is characterized by being thicker and easier to read. Small size is lighter, easy to hold and carry out. Both sizes are come with a velvet bag that can be used to store the product for better protected. And come with a magnifying glass which can be used to see elements more clearly. 83 Real Elements Inside The periodic table with 83 real elements inside, you can see 3D different shape and colorful real elements clearly. Printed Legibly Clear printing makes reading easy and fast. At the same time, the printed fonts are well protected, and they will not fade due to friction. Three Layers of High Quality Acrylic The element table is made to the proper thickness, you will have a good feel when placed in the hand. It is sturdy and not easy to break. Smooth Edge We sanded the edges of the periodic table so it feels smooth and wont cut your hands when you put it on. Transparent Acrylic The periodic table made of high quality acrylic, you can observe the elements clearly. This periodic table with real elements inside is not only for kids, but also a great science gift for adults, science fans and chemistry lovers. Parents can study and observe the periodic table of elements with their children to enhance relationship. This periodic table with real elements inside is also a nice decoration for office, school and home. This is definitely a high-class and beautiful tabletop ornament. Due to the instability of some elements, they are prone to react with each other and volatilize easily. For safety reasons, they are specially treated, replaced by compounds containing such elements, or replaced by substances of similar shape and color. And some rare chemical elements that are not easy to collect are especially replaced. Q: A customer reflects that Potassium and Mercury should both are silvery looking metals. A: In the actual production, we give these two elements special treatment for safety. Potassium is harmful, so we used something similar in color and shape to replace it, so you can see it is silvery white in this elements table. Mercury is also harmful liquid substance, so Mercuric compound was used instead.