Grit size	SiC Mix	Free Carbon Max	Fe2O3 % Max
nature	98.5	0.3	0.8
0-10 mm	98.0	0.3	0.8
150 mesh	97.0	0.4	1.2
200 mesh	97.0	0.4	1.2
325 mesh	97.0	0.4	1.2
0-325 mesh	90.0	2.0	1.5
nature	90.0	2.0	1.5