This is a very well made louver vent. It is heavy duty bonderized steel that is ready to paint, and you must use steel paint on it - it should not be used without being painted as bonderized steel is more of a raw finish that shows scratches easily. The filter is quite dense but still allows excellent air flow. My only issue with the design is that the filters are permanently installed and cannot be removed for cleaning. Overall, an excellent well-made product.