This 290-piece organic chemistry molecular model teacher set includes 122 atoms and 168 links for demonstrating single, double, and triple covalent bonds. The set comes with a link removal tool, a detailed instruction manual with photos of organic and inorganic molecules, and a hard plastic storage case measuring 9.3 x 6.7 x 2.3 inches. Atoms include 26 carbon (4-hole), 6 carbon (3-hole), 6 carbon (5-hole), 42 hydrogen, 12 oxygen, 6 nitrogen, 2 sulfur, 4 phosphorus, 12 halogen, 2 metal (1-hole), and 2 metal (2-hole). Links include 6 each of 2D-orbital grey and pink, 60 medium grey, 30 long flexible grey, and 66 short white. Suitable for advanced organic chemistry teaching.