Model of a DNA double helix consisting of fve two-layer models with a total of 640 atom spheres. The double-layered models represent the molecular structures of thymine-adenine and cytosine-guanine with ribose-phosphate chains. Atom spheres and linking rods are made of resilient plastic and are color coded. The model is 46 cm high but held formly on a stand.

Atoms: 17 mm to 23 mm diam.
Height: approx. 46 cm