DNA double helix structure model kit, it is made of plastic material, reliable and safe, easy to assemble and disassemble.Professional DNA double helix structure model makes your easy understanding of biological terminology, it is a nicescience educational teaching instrument toy. Features -Color:As Shown-Material:Plastic- Size: 40.00X5.70X2.00cm/15.72X2.24X0.79in-Constructed by using plastic material, ensures it safety and can use it with confidence.-The molecular model kit can be removed and separated for further examination.-It is perfect and wonderful for students and biology lovers to explore molecular world.-It make learning come alive and build creativity with this interactive science science educational toy.-The wonderful craftsmanship and simple design will ensure its practicability and popularity.Packing list: 1 x Double Helix DNA Model