... provide you the following material: stainless steel, carbon steel, zinc,Galvanized,Aluminum,Brass,Copper,Plywood,Fiberboard,Rubberboard,Woodboard,Pasteboard,Al-Mg ... if you tell us the exact specification.The hole shapeRound, square, long round, triangle, scale, diamond, oval, hexangular, slot etc. ... precise product. If not, we will according to standard tolerance. galvanized perforated wire mesh