All sets are fully compatible. Atom parts are made of solid clouded plastic spheres. 

The Jlab India system is an original, unique system of high quality molecular models. 

The set consists of a variety of atom parts and links designed to make a large number of possible structures relevant to a specific chemistry subject or use, e.g. Biochemistry, Organic or Inorganic. They are available with holes from 1 to 6 in the usual angular orientations.