DNA Double Helix Model, 22 Layers, miniDNA® Kit

This kit builds a right-handed DNA double helix with colour-coded components representing nitrogenous bases, deoxyribose and phosphate groups. It demonstrates complementary base pairing, hydrogen bonds, and the major and minor grooves, and can be used to model DNA replication. Supplied with assembly instructions and stand; dimensions are approximately 44 × 11 × 11 cm and weight is approximately 500 g.