Technical specifications vary by sub-category: for lighting fixtures, ensure CE, UL, or SAA certification and check IP ratings for moisture resistance; for textiles (rugs/cushions), look for a high Martindale rub count (≥20,000) and colorfastness to light (Grade 4+). For ceramic or glass decor, inspect for annealing quality to prevent spontaneous breakage. It is essential to work with suppliers who provide detailed CAD drawings or 3D models to ensure the items fit the intended spatial scale of your interior design projects.