... resin bond for granite,marble 2.50#, 100#, 200#, 400#, 800#, 1500#, 3000#, Buff 3..Much more aggressive to achieve a ... Step 4: #400 for Soft grinding / medium polishing Step 5: #800 for Extra polishing Step 6: #1500, #3000 for Final polishing ... No.DiameterThicknessGritInchmmmmFPW803"802.550#,100#,200#,400#,800#,1500#,3000#,Buff 50#,150#,300#,500#,1000#,2000#,3000#,BuffFPW1004"1002.5FPW1255"1252.5 ...