MAP Vents 936-37 Metal Adjustable Vents, Chrome, 9" x 6"

The product is advertised as "Overall vent size: 260mm x 165mm" though then I measure it its 245mm x 165mmThe name of the product also has 9 inch = 228mm x 6 inch = 152 so this is also the wrong dimensions of the productIt's also very flimsy so closed it still isn't really closed and lets light through.