Flat illuminated letter sign is a bright sign with better integrity and better visual effect. It is different from the usual style the surface is clear and integral, without the stainless steel edging, can attain a better visual result. The flat letter signs are made of 6-8mm acrylic material, produced by engraving and polishing process, and then part of the acrylic is embedded in the stainless steel frame. Then the convex acrylic edges are polished and chamfered to finish the smooth and transparent letter sign. Letter side we can provide brushed surface treatment, mirror polishing and rework, titanium coating, can produce gold, silver, rose gold, champagne gold, copper, bronze and black steel surface treatment. More upscale! It is also a unique advertising logo when the light is off, and the effect is more conspicuous when illuminated.