6. Oxygen double bond, Halogen, Hydrogen These parts are similar in shape but represent different distance from the center according to each covalent radius. At present, Flourine and Chlorine are only available among halogen group. Parts for Bromine, iodine are scheduled for future production.

7. Octahedralm Trigonal, Bipyramidal, Pentagonal bipyramidal These parts are designed for use to construct organo-metalic compounds. Parts Octahedral are available in 2 sizes of bond length 1.20 A and 1.40 A according to each atomic radius.