【Anti-corrosion Material】This roof vent cap is crafted from high-quality iron ... metal ducts and is compatible with kitchen and roof exhaust systems for efficient indoor air circulation.

Install the dryer vent cap against the side of your house, making sure that its attached pipe fits through the wall opening ...

They all have a cap over the exhaust opening ... it's easier to vent the fan through a side wall. In such cases, a wall-mount fan usually makes more sense than a ceiling-mount.