This model now features the major and minor grooves. Contents: 22 base pairs comprising: 11 Thymine (T) (orange) 11 Adenine (A) (blue) 11 Guanine(G) (green) 11 Cytosine (C) (yellow) Side chain: 44 Deoxyribose (red) 44 Phosphate (purple) Stand: 1 Model stand (grey) 2 Support Rods (grey) 23 Spacers 1 Cap (white) (dims: H44cm x ø11cm) Assembly leaflet. Packed in a plastic box.