Quantity:1pcs.Material: plastic.Color: show as picture.Total 968pcs， 498balls and 470keys.Miniature ball-tube model of the molecular crystal structure (stick + proportional).This package covers the model can take organic and inorganic molecular structure model， a common crystal structure model (diamond， graphite， sodium chloride， carbon 60).This Set Polymer Chemistry Molecular Model Set is designed for school teaching and lab research， Economical and versatile， etc. This set can build models for simple lattices such as diamond， NaCl and alkanes， alkene， aromatics， alcohols， thiols， amines， ketones， hexane， C， H， O， N， S， many other common organic and inorganic molecular structure!Your molecular model set will bring to life such concepts as stereoisomerism and conformational analysis， and help you relate the physical and chemical properties.The plastic box is included.It is fit for teachers or students.Size:21.2*16*6cm.Net Weight: Approx 488g.Easy and convenient to use.WARNING: Choking Hazard， Contains small parts， please prevent kids swallowing the small parts by mistake. Kids under 3 years old should be under the tutelage of parents when they play with this toy.Package Include: 1 x Chemistry Scientific Atom Molecular Model Teach Class Kit Set( plastic box is included)