The VIVOSUN 4 Inch 195 CFM Inline Duct Ventilation Fan Vent Blower is designed for use in grow tents, providing efficient and effective ventilation. With a circular vent style and a 4-inch diameter, this black plastic fan operates at 120VAC with a single speed. It features an axial blade orientation and comes with a built-in mounting bracket for easy installation. Made by the trusted brand VIVOSUN, this exhaust fan is suitable for maintaining a healthy environment in hydroponic setups and outdoor living spaces.