Product name: 6"7"8" stainless steel exhaust fanMaterial: Stainless steelColor: silver6 inches:Power: 40WNoise: 31dBAir volume: 780m³/hSize: 190*190*150mmhole size: diameter 146mm7 inches:Power: 60WNoise: 31dBAir volume: 980m³/hSize: 230*230*150mmhole size: diameter 176mm8 inches:Power: 80WNoise: 34dBAir volume: 1280m³/hSize: 250*250*150mmhole size: 200mm in diameter Package Included:1 x Exhaust FanNote1 Please check the size and color before purchasing.2 Does not include items other than those shown in the product photo.3 Please note that due to the different monitors, slight chromatic aberration may occur, please understand.4. The above data is for reference only, the size is manual measurement, each variable may be different, please refer to the actual product, thank you.5. If you find any problems with our products, please feel free to contact us by email and we will resolve the problem as soon as possible.6. 7. Thank you for visiting my store, click to enter my store, there will be a lot of products for your referenceThis exhaust fan is built to endure the demands of daily ventilation and will provide you with years of exceptional performance.