... aluminum, brass etc. Hole: round, rectangular, elliptical, diamond... Perforated sheet, also named perforated metal, is one kind of ... elliptical, square, triangle, diamond, hexagonal, cross, slotted, star, plum blossom, other special patterns.Sheet sizenormally 2m*1m, 2m* ... pattern and sizehole pitch-----staggered or straight sheet shape sheet sizes (length*width*thickness)Marginsdimensions of blank ...