There are tons of intro molecular model sets to choose from. Your textbook company likely has one that they recommend you purchase that (surprise surprise) costs a fortune. This model set covers most basic inorganic and organic chemistry topics and is extremely affordable. It is the same configuration and quality as the other brand name sets available. The set comes with a plastic case and instructions. The kit contains: 6 black carbon (4 holes) 14 White hydrogen (1 hole) 2 blue nitrogen (4 holes) 1 blue nitrogen (5 holes) 6 red oxygen (2 holes) 3 yellow sulfur (one each: 2 holes 4 holes and 6 holes) 1 purple phosphorus (5 holes) 6 green halogen (1 hole) 3 gray metal (1 hole) 3 gray metal (2 holes) 2 gray metal (3 holes) 1 gray metal (4 holes) 1 brown **sp3 (4 holes) 1 brown ** dsp3 (5 holes) 1 brown **d2sp3 (6 holes) 28mm Gray links (20) 43mm Gray links (10) 28mm Purple links (5) 4 Compartment Case