The white 1 prong Orbit atom is represent hydrogens & is found in virtually every model set & kit we supply. The 68827W advanced student organic chemistry molecular model set comes with 36. The larger 68847W class organic chemistry set comes with 200.
On the other hand, our 12 base pair DNA model comes with none. We do this because the model is designed for student assembly & the extra time & cost of adding & removing all the hydrogens is unwarranted.
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.