DIKA SIGN produces custom aluminum letters in two principal product families. Aluminum Channel Letters use fabricated aluminum faces or returns with illuminated or non-illuminated construction for storefronts, large exterior identities and projects where low weight, corrosion resistance and paint performance are important. Carved Aluminum Letters use solid or layered aluminum with CNC machining, engraving and relief carving for dimensional logos, plaques, interior branding and smaller identification details requiring sculpted surfaces and precise edges. Painted, halo-lit and other lighting treatments are configuration options rather than separate product categories. Project specifications may include letter height, stroke width, material thickness, depth, reinforcement, paint system, illumination, LED color temperature, backing and mounting. Supported by Shanghai-based coordination and factory-direct production in Lu’an, DIKA SIGN provides artwork review, shop drawings, machining, forming, welding, finishing, LED assembly, testing, mounting templates, pre-assembly and export-ready packaging for accurately made, installation-ready 3d  aluminum letters.