... polishing pad 1)polish convex surface 2) 50# to buff 3)For Marble,Ganite,Concrete 4)Thickness:as requied 100mm concave polishing ... Marble,Ganite,Concrete 4)Thickness:as requied Diamond convex polishing padOut diameterApplicationGrit ... SizeinchmmGranite, Marble,Sandstone, Limestone, etc#50, #100, #200, #400,#800,#1500, #3000,buff3"75mm4"100mm concave polishing pad ...