4''diamond dry polishing pad 1)diameter:80,thickness:2.0, 2)usage ... use 4)with long life The description of dry polishing pad:1, Grit:50,100,150,200,300,400,500 ... produce different granularites and size as requestedThe detail of diamond dry polishing pad: SizeDiaThicknessGritDPP-180mm2.0mm50#,100#,150#,200#,300#,400#, ... 0mm2012 China Xiamen International stone exhibition: 4 inch diamond dry polishing pad