Orbit 3 prong black 120-120-120 degree atom represents carbon & can be used to represent molecular hybridization in molecules such as benzene. It is used exclusively in our buckyball and carbon nanotube models and is one of 4 carbon geometries found in our 12 base pair DNA model.
Indigo Instruments has held inventory of genuine Cochranes of Oxford atoms & bonds for over 30 years (scroll down to see "Skeletal (Orbit/Minit)". These parts are 100% compatible with every set & kit we've ever sold. Why buy from others where support could end the day after?
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.