with abrasive belt of grit#100-#200, have better brightness with
discontinuous coarse stria, used as inner and external ornaments for building,
electrical appliances and kitchen utensils etc.
No.4 :olished with abrasive belt of grit #150-#180,have better brightness with
discontinuous coarse stria, but thinner than No3, are used as bathtub buildings
inner and external ornaments electrical appliances