All of our Products are Laser cut from 3/16 thick Steel Plate and Powder Coated with a Mini Textured Exterior Black Finish. They all meet 4 inch code. Our Standard Panels are Flat Steel Panels with the designs cut out of them. Our Bordered panels are our flat panels with a 3/16 thick x 2 inch wide flat bar welded around the outside with screw holes in them for mounting.