BIROYAL Acrylic Periodic Table of Chemical Elements Periodic Table Display Teaching Tools for Teachers Students Gift Decoration Crafts Colorful Real Elements The product contains a single sample of 83 real elements. Due to the radioactivity and rarity of some products, they have been excluded. Material: high-quality acrylic and crystal adhesive, safe, non-toxic, odourless and durable. Safe handling and storage, ideal for the desk. Product size: 170 x 120 x 20 mm (size deviation of plus or minus 1-3mm, does not affect the appearance and performance). Widely Used It can be applied in classrooms and laboratories to make learning more interesting, provide teachers with professional learning tools, and can also be used for desktop display. Perfect gift: This is an ideal gift for teachers and friends. It can be stored on the desk or held in your hand for study and research and is a feast for the eyes as a decoration anywhere.