Currently, there are many types of PVC coated flexible metal conduit's specifications and colors. Some friends think that the quality of the black PVC coated flexible metal conduit will be better. In fact, there is no scientific basis for this statement, flexible metal conduit from the color to distinguish its quality is still relatively general conclusion, black and gray metal conduit is widely used in the market, the relative use of other colors Less, there are words that are rare and expensive, so the color of the order is relatively more expensive than black and gray, but the quality is still the same.
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