You can insert these "X-pegs" into various univalent, divalent & trivalent atoms to create double or triple bonds. This is unique to the Orbit models & allows for flatter rings.
This feature is used effectively in our best teaching DNA double helix molecular model to illustrate the antiparallel nature of the 2 strands. These pegs are also included in our Orbit class/teacher's biochemistry model set, and Orbit fatty acid models kit.
You can use these Genuine Cochranes of Oxford Orbit Molecular Model Parts to replace missing pieces or augment any of the Orbit Molecular Model Sets & Molecular Model Kits supplied by Indigo Instruments.
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