Specifications:

0.50D, 1.00D, 1.50D, 2.00D, 2.50D, 3.00D, 3.50D

4.00D, 5.00D, 6.00D, 7.00D, 8.00D, 9.00D, 10.00D, 12.00D, 15.00D

The material of the lenses are glass.