Material: Manufactured both front and edges in aluminium. If they have a rear part, this may be methacrylate if it is backlit, or aluminium in case of lighting.
Size: Such letters are typically used for making medium and large size signs, usually for letters from 40 cm high.
Letter depth: Between 8 and 12 cm.
Colours: Any colour to choose from RAL
Attachment Bolted to the wall.
Lighting: Available without lighting or backlit where light comes out from the back of the letter.
Common uses: Very common for the manufacturing of medium and large external letters.