# Percent Ar, Cell Width (mm)
0,    5.5
16.7, 6
28.6, 9
37.5, 10
44.4, 11.5
50,   11.5
58.3, 12.5 
64.3, 13.5
68.8, 15
76.2, 14.5
83.3, 17.5
88.9, 45.5
91.7, 158