Common hole sizes are 1/32", 1/16", 3/32", 1/8", 3/16", 1/4", 3/8" and 1/2", 3/4" and 1". Other hole sizes can be manufactured. Also available are decorative patterns. Standard available sheet thicknesses are 20ga, 16ga, 11ga, and 3/16", 1/4", and 3/8". Alternate thicknesses can be manufactured. Common materials are stainless steel (304 and 316), we also supply mild steel and aluminum perforated sheets. We can supply various perforated louvers in either mild steel, stainless and aluminium with various dimensions depending on both the application and architectural needs. Perforated louvers are generally used in doors to permit the movement of air from one area to another. Louvers offered by Dezhou Perforated Metal Factory has an average twenty percent open area. Perforated louvers sheets are used in many applications ranging from locker doors to air ventilation grilles.