Sandpaper Grit Scales
		1 Micron    =	0.00003937007874				Inches
Description Scales			MMR	MMX	CAMI Scale	ISO/FEPA   (P-scale)	Finishing Scale	Grit	Particle Size in Microns	Particle Size in Inches
	Very Coarse	Very Coarse						4.5	1842	0.07252
						P12			1815	0.07146
						P16			1324	0.05213
					16			4	1320	0.05197
						P20			1000	0.03937
M					20			3.5	905	0.03563
						P24			764	0.03008
A					24			3	715	0.02815
	Coarse				30			2.5	638	0.02512
C						P30			642	0.02528
					36			2	535	0.02106
R						P36			538	0.02118
					40			1.5	428	0.01685
O		Coarse				P40			425	0.01673
					50			1	351	0.01382
G						P50			336	0.01323
	Medium	Medium			60			0.5	268	0.01055
R						P60			269	0.01059
						P80			201	0.00791
I					80			0	192	0.00756
		Fine				P100	A200		162	0.00638
T					100			2/0	141	0.00555
	Fine					P120			125	0.00492
S					120		A160	3/0	116	0.00457
		Very Fine				P150			100	0.00394
					150		A130	4/0	93	0.00366
					180			5/0	82	0.00323
						P180	A110		78	0.00307
	Very Fine				220			6/0	68	0.00268
						P220	A90		66	0.00260
						P240	A75		58.5	0.00230
					240		A65	7/0	53.5	0.00211
						P280			52.2	0.00206
M						P320	A60		46.2	0.00182
				80	280			8/0	44.0	0.00173
I	Extra Fine	Extra Fine				P360			40.5	0.00159
				100	320			9/0	36.0	0.00142
C						P400	A45		35.0	0.00138
						P500			30.2	0.00119
R				150	360				28.8	0.00113
						P600	A35		25.8	0.00102
O		Super Fine	1500	180	400		A30	10/0	23.6	0.00093
						P800	A25		21.8	0.00086
G	Super Fine				500				19.7	0.00078
						P1000			18.3	0.00072
R			1800	240	600				16.0	0.00063
						P1200	A16		15.3	0.00060
I		Ultra Fine				P1500			12.6	0.00050
			2400	320	800				12.2	0.00048
T						P2000			10.3	0.00041
					1000				9.2	0.00036
S						P2500			8.4	0.00033
			3200	360	1200				6.5	0.00026
			3600	400	1350
			4000	600	1500				3?
			6000	800	2000				1?
			8000	1200	2500
			12000						submicron
Description Scales			MMR	MMX	CAMI Scale	ISO/FEPA   (P-scale)	Finishing Scale	Grit	Particle Size in Microns	Particle Size in Inches