Initial Pressure (kPa) &  Cell Width (mm) \\
30 &      9.3 \\
31.5 &    7.8 \\
35 &      6.5 \\
40 &      5.8 \\
45 &      5.3 \\
50 &      5.5 \\
55 &      7.5 \\
80 &      5 \\