Fieser molecular model research kit

Low-cost molecular models designed by Professor Louis F. Fieser. The models consist of sturdy, color-coded plastic and aluminum parts that snap together to form bonds. They are easily assembled and handled, and may be disassembled for repeated use. Fieser models are highly effective for assessing conformational and steric effects, and geometrical relationships. Additional atoms and bonds are available separately. Each kit consists of:

• 30 tetrahedral carbon atoms (black)
• 6 pairs of double-bonded carbon atoms (black)
• 5 oxygen (or sulfur) atoms (red)
• 2 trivalent nitrogen atoms (blue)
• 2 sulfur atoms (yellow)