... quality Material We can provide you the following material: stainless steel, carbon steel, zinc,Galvanized,Aluminum,Brass,Copper,Plywood,Fiberboard,Rubberboard,Woodboard ... are tolerances on thickness, pitch, openings, flatness, and shearing for perforated products. You should specify a specific tolerance ,so we can ... precise product. If not, we will according to standard tolerance. perforated mesh