The 68845NV student model set includes 12 carbons and 18 hydrogens which will allow you to build a variety of carboxylic acid structures. These are important basics for both organic chemistry and biochemistry. You can build any of the essential amino acids with this set.
Every Orbit molecular model set sold by Indigo Instruments is fully compatible with others you might own. You can replenish any set or customize it with Genuine Cochranes of Oxford Orbit Atoms.
I've had consistently great service from this company. Our students seem to really appreciate the reasonable price. In the years that we've used this product, not one has been returned due to defects.
Considering how many of these we sell to schools every year, that is high praise indeed. Thanks letting us know.