(1) 3mm acrylic panel as the face                                                                                                                                                                  (2) 304#1.0mm stainless steel powder coated as the sides                                                                                                                                                                 (3) Letter thick 50mm(Determined by the size of the letter)                                                                                                                                                                (4)SMD LED module in side as the light source                                                                                                                                                                        (5)10mm PVC panel as the back plate