Every skull is unique, just as every face is unique, and for the same reasons. At Dapper Cadaver we have over 20 different lifecast skulls, showing the full range of human features. When you order the Cast Skull Combo, thats what you get - 4 unique skulls with clearly distinct features. No collection of real skulls would have the same face repeating over and over, and no quality collection of replica skulls should either. Our collection includes young, old, male female, races from all over the world, large and small, good teeth and bad teeth, and more.