... as per drawings or samples 4.100% inspection Item NO. Coupling FlangesMaterialsIron, aluminum, steel, copper, plastic, carbon steel, nylon, bronze, solder ... to customer’s drawingSurface treatmentHeat treatment, polishing, PVD/CVD coating, galvanized, electroplating, spraying, and painting and so on.PackingWooden box, or ... be our great pleasure to be on service of you! Coupling Flanges