Thickness (mm)* I II III IV V VI VII VIII 5.31 6.35 7.23 8.41 5.58 6.27 7.14 8.30 4.80 5.06 4.88 4.89 0.00 0.00 0.00 0.00 Width at Mark 3 (mm) Mark III (5mm thickness) Initial Final 19.19 19.60 Mark VII (2.5mm thickness) Initial Final 19.15