VEVOR 6 inch Through-The-Wall Ventilation Fan, 205 CFM Through Wall Exhaust Fan with AC Motor, Quiet Vent Easy Installation for Bathroom,Garage,Laundry Room,Storage Room Air ExchangerRapid Air ExchangeInstallation GuidelinesYear-Round ComfortQuiet OperationVersatile ApplicationReliable UseSpeed: Single Speed, No Switch,Maximum Airflow (CFM): 205 CFM,Item Dimensions (L x W x H): 12.2 x 10.63 x 10.51 in / 310 x 270 x 267 mm (Min. Extension),Color: Black,Noise (dB): ≤46dB (Measured at 1 Meter),Speed (r/min): 1640 r/min,Fan Diameter: 6.3 inch / 160 mm,Voltage Frequency: AC120V 60Hz,Item Model Number: BT-RTR31-AC1,Wall Thickness Compatibility: 6-8.25 inch / 152.4-209.55 mm,Net Weight: 8.71 lbs / 3.95 kg,Power: 18W,Main Material: SPCC