Pearl 1 is a highly translucent, non-preshaded zirconia. Pearl 2, 3, 4 and 5 are pre-shaded to match the VITA shade range. Shell 1 is a high strength, non-preshaded zirconia substructure and Shell 2 and 3 are pre-shaded zirconia substructures matched to the VITA shade range. All are made in Germany.