Variety:Round hole standard sieve round hole perforaed metal sheet The hole diameter:0.8-100mm 1.Introduction1)The Punching ... generous.2)high precision, small error and good quality.3)he same thickness at the aperture3.specification1)It is ... 3mm.3)materials:low carbon steel, stainless steel plate, galvanized plate.4)Sieve-shaped with round hole, square hole, diamond hole, elliptical hole, hexagonal ...