3M 360L PSA Sanding Disc Roll, 6", NH, Aluminum Oxide, P800 Grit, 3 mil Wt Film, 125 PK DSR119 Features Low loss Features Low loss Lined Bearings Finish Polished Mounting Hole Center to Center 200 mm Shaft End to Hole 100 mm Product Type Linear Shaft Shaft Material Finish Polished Shaft Drilling Pre Drilled Surface Roughness 8 12 RMS System of Measurement Metric Standards ISO Shaft Material Stainless Steel Shaft Hole Spacing 200 mm Shaft Material Grade 440 End Type Plain Ends Shaft Type Pre Drilled Shaft Surface Hardness Minimum 60 HRC Roughness 8 12 uin RMS Weight Per Meter 9 PSA Sanding Disc Roll Number of Vacuum Holes Non Vacuum