Feature1.brand new and high quality2.Suitable for Wall Flange ConnectorMade of effective ABS material, durableHigh strength and corrosion resistance.Smooth surface, small air resistance.For connections between pipes.Mounted on the wall as a air flow duct.Can be used as air inlet and outlet, installed in indoor ventilation equipment.1.material:ABS 2.color:As the pictures shown3.size:as the picture showsPackage include:1 pcNote:Please enable minor error thanks to manual measurement.The colors may be a little distinction for the several visual display unit display.