Sizes: Opening diameter from 0.2mm to 20mm, thickness from 0.2mm to ... sheet,steel sheet,copper sheet,PVC coated sheet.Specification:the hole shape are rectangle,aquare,round,triangle,ellipse,are and so ... in separation, sifting, filtration, drying, cooling, cleaning, etc. Sizes: Opening diameter from 0.2mm to 20mm, thickness from 0.2mm to ...