Three sizes of the SHAMI SV-2425" 10" VENTILATING FAN Exhaust Fan Legit are available. Ten inches, simple to install in a square wall opening, low power consumption, easy to clean, and electrostatically painted metal body. Size of opening: 30 x 30 cm square Delivery by air 10%±900 rpm speed 5%±1300 watts power source 220V/50Hz