137 Atom-parts and 130 links This Set is designed to make Compact models of a wide range of basic organic structures. See photo adjacent. Note : The atom-parts are not 100% apace-filling Contents: 41 carbon (25 tetra, 16 tribipyr), 5 Halogen mono, 23 Oxygen (18 ang, 5 mono), 2 sulphur (1 ang, 1 tetra), 2 Phosphorus (1 tetra, 1 tribipyr), 1 Metal octa, 53 Hydrogen (50 Molydomektype, 3 linear), 10 Nitrogen (5 tetra, 5 tribipyr). Links: 130 links (50 short white, 75 NV-links, 5 medium gray), 1 short link remover tool.