Perforated Steel Sheets are standard mild steel sheets that have been perforated by "punching" holes in the material.
Hole shapes can be round, square, slotted, hexagonal, and just about any shape imaginable.
Sizes are listed by Thickness and Size of the sheet, Hole size and Hole center to center dimensions.
Galvanized sheet thicknesses differ from cold rolled sheet, due to the
added layer of zinc coating applied to the material.