4 Drawer Den for 2 Clear Premium. Sphere Powers: BC 8.3: -0.25 to -8.00 in 1/4 D steps.BC 8.6: -0.25 to -8.00 in 1/4 D steps.  -8.50 to -10.00 in 1/2 D steps.   Powers doubled up in bins for -6.25 to -10.00.  +0.25 to +8.00 in 1/4D steps.  Powers doubled up for +3.25 to +8.00. Dimensions: W 12 3/8", H 11 5/8", D 12 3/16"