Function: 1. Acrylic Material: The true periodic table uses acrylic, which is safe, odorless, good to store and durable. 2. Versatile: It can be placed in the class to stimulate students interest in chemistry, or it can be placed in the laboratory, a practical tool. 3. Gifts: The periodic table of chemical elements is the perfect gift for teachers, students, children and science lovers. 4. Light transmission: The periodic table is made of acrylic with high light transmittance and low haze, so you can see the elements very clearly. 5. Note: Keep it clean with a cloth every time you touch it to avoid fingerprints. Specification: Item Type:Elements?Periodic Systems Material: Acrylic Package List: 1 x periodic system of the elements. Note: Please note that the new type and old type of this product will be shipped randomly, and make sure that you do not mind before ordering.