Standard sheet sizes are 2400 x 1200 mm, however most laser cut screens are custom made and can be made from: Aluminium Lightweight and non corrosive. Powder coating available in a range of colours. Corten Steel A self-sealing steel that develops a unique patina as it ages. It will leach (drip rust) when wet. Stainless Steel Brushed or mirrored (indoors only) finish available.