Three dimensional model of DNA Easy to construct, the colorful bases snap together in the correct sequence, and the pairs attach to a center rod representing hydrogen bonds Two flexible strands signifying alternating pentose and phosphate units attach to the end of each pair, forming the double helix Emphasizes the base pair sequence and function of DNA Once completed, model can be rotated on its sturdy base Includes enough materials to construct one models Supplied with manual Size 13 x 13 x 45 cm approx