This kit contains 11 Thymine (orange), 11 Adenine (blue), 11 Guanine (green), 11 Cytosine (yellow), 44 Deoxyribose (red), and 44 Phosphate (purple). Each of the 12 layers ascends upwards in an anti-clockwise direction at an angle of 36° with 1 complete turn after 10 layers. Pegs represent hydrogen bonds. Approximate scale is 1 cm = 2 Angstroms. Includes 2 rods, 1 model stand, 23 spacers, 1 cap, and assembly instructions.