The basic frame of the wall fish is created using tin, which is powder coated as a black finish. The frame is reinforced using wrought iron wire along the inner edge. Capiz is an oyster shell and the primary purpose of the oyster is as a source of food. However, the by-product, the shell, can be used for decoration. Due to it being a natural material, the natural colors of the capiz can come through as tans and browns underneath the paint.