Color
Description
Grit(μm）
Grit Medium
(μm)
Grit Mark
Grey
Ultra fine
4 to 14
8
M4 to M14
Red
Fine
27 to 76
46
M27 to M76
Green
Coarse
107 to 181
151
D107 to D181
Black
Extra Coarse
151 to 213
181
D151 to 213