SIZE:5ss=1.70-1.80mm/0.06 inches
SIZE: 9ss=2.50-2.60mm/0.10 inches
SIZE:16ss=3.80-4.00mm/0.15-0.16in.
SIZE:20ss = 4.60-4.80 mm/0.18-0.19 in.
SIZE:30ss=6.32-6.50 mm / 0.26-0.26 inches
