... pads are extremely flexible,fast polishing,extremely cost effective. Size:3",4",5",6". Flexible polishing pad is a kind of ... colour stone finally and black buff for dark colour. SizeGritSpecification 3 inch #50,#100,#200,#400,#800,#1500,#3000,#50001) Flexible polishing ... in a short time,as compared with conventional polishing wheel.3) Suitable for the grinding process of the curved or polygon ...