Grade 6 (SNI: Value of Defects 151-225), Grade 5 (SNI: Value of Defects 81-150), Grade 4B (SNI: Value of Defects 61-80), Grade 4A (SNI: Value of Defects 45-60), Grade 3 (SNI: Value of Defects 26-44), Grade 2 (SNI: Value of Defects 12-25), Grade 1 (SNI: Value of Defects 0-11)