Material:stainless steel plate,thin low carbon steel plate,brass plate,aluminum plate etc.Hole shape:diamond,square holeApplication:this product is everlasting,it is widely used in filters baskets,air filtration units,medicine,machine guards,animal cages,the protecting of electrical equipment window,safety door&window,plaster trims,fan covers.Special designs or sizes is also available at customers&＃39; request.