When evaluating steel display shelves, the material grade and thickness are paramount. Prioritize Cold-Rolled Steel (CRS) for its superior surface finish and structural integrity. Ensure the upright post thickness is at least 1.5mm to 2.0mm for heavy-duty applications. Additionally, verify the load-bearing capacity per layer, which should typically range from 50kg to 150kg depending on your specific retail or warehouse needs. The surface treatment must be a high-quality powder coating to prevent corrosion and scratching.