Features MAIN OBJECTIVE: The DNA double helix structure model helps you easily understand biological terminology and is also a great tool for popular science teaching. APPLICABLE SCENE: This DNA structure model is suitable for high school biology classroom teaching, DIY experimental demonstration, DNA structure display, etc. PVC MATERIAL: The DNA structure model is made of excellent PVC plastic, environmentally friendly and durable, and can be used with confidence. MULTIPLE COLORS: The double helix structure model is designed with multiple colors, making learning more vivid and cultivating students' imagination and creativity. EASY ASSEMBLY: The DNA display model has a simple structure that is easy to assemble and disassemble, making it suitable for students and biology enthusiasts. Specification: Item Type: DNA Model Material: PVC. Use: As a teaching tool to demonstrate the composition of DNA. It includes 4 bases, 5 carbon sugars and phosphoric acid, and can demonstrate the structure of the DNA double helix, in which two parallel polynucleotide chains form a left and right helix, with phosphoric acid on the cylinder and base pairs in pairs. in the middle of the cylinder, with the plane of the pair of bases perpendicular to the cylinder. It can also be used for exhibition purposes or popular science education. It is assembled by various components and can be removed when used. Product specifications: helical structure, including 16 pairs of bases and corresponding components. Package list: 2 x DNA model 1 x storage box Package List 2 x DNA Model 1 x Storage Box