(80 mm flat profile / 45° with mitred corners. Double-sided door lock system frame, front loading graphics with a locking key.Fully water-proof, width of frame molding: 80mm (front frame all around) ,and the overall depth of the light box is 80 mm. The aluminum alloy has been oxidated and it is very nice and durable.Edge lit with  T5 fluorescent tubes EC approved or SMD led lighting.Sizes A1,A0,AA,AB and custom sizes.The graphics are fixed by magnetic strip (not double sides glue), which makes it easy to change pictures.