1 AL2O3 content:95.70% 2 grain size:F12-F220 3 for bonded abrasive 4 passed ISO 9001:2000 5 ... , P series for coated abrasive)F series: F4, F8, F10, F12, F14, F16, F22, F24, F30, F36, F40, F46, F54, F60 ... , F70, F80, F90, F100, F120, F150, F180, F220, F230, F240, F280, F320, F360, F400, F500, F600, F800, F1000 ...