(70 mm flat profile / 45° with mitred corners. Fully water-proof, width of frame molding: 70mm (front frame all around) . single side, screw-locking at only one side.The overall depth of the light box is just 44 mm. The aluminum alloy has been oxidated and it is very nice and durable. Axis and pressure poles are attached to easily open the light box and install. Edge lighting technology, light is soft and mild, brightness is very equal, which is very comfortable for eyes .The graphics are fixed by magnetic strip (not double sides glue), which makes it easy to change pictures.Front clear protector sheet .Back board for stability   (2mm aluminium-plastic panel).The wire is 2m normally and is external(on the back of the box), water-proof without plug. Wall type, allowing four mounting holes on two short sides for installing before delivery.