... grinding. Step 3: #200 for Semi Coarse grinding Step 4: #400 for Soft grinding / medium polishing Step 5: #800 for Extra ... for Buffing Specification: Item No.DiameterThickness GritInchmmmm100mm4"801050#,100#,200#,400#,800#,1500#,3000#,Buff 50#,150#,300#,500#,1000#,2000 ...