OpenAngle(deg)	Allowance(mm)
20	  -0.300
30	  -0.531
40	  -0.762
50	  -0.994
60	  -1.225
70	  -1.456
80	  -1.687
90	  -1.919
100	  -1.506
110	  -1.182
120	  -0.921
130	  -0.709
140	  -0.531
150	  -0.378
160	  -0.243