SIZE: 6ss=1.90-2.10mm/0.07 inches
SIZE: 12ss=3.00-3.20mm/0.12 in.
SIZE:16ss=3.80-4.00mm/0.15-0.16in.
SIZE: 20ss=4.60-4.80mm/0.18-0.19in.
Size:30ss=6.32-6.50mm/0.25-0.26in.
SIZE:40ss=8.41-8.67mm/0.33-0.34in.
