Mars Hydro 4 Inch Inline Duct Fan and Carbon Filter Combo with Thermostat ControllerKits Include: 4'' Inline Duct Fan 4'' Carbon Filter Thermostat Controller Flex Ducting Duct Clamps Quiet Operation and Powerful Ventilation: With a PWM controlled motor and mixed flow design, the Mars Hydro 4'' inline fan delivers airflow up to 205 CFM and operates quietly Keeps the Air Fresh: The filter core is made of activated carbon imported from Australia, bringing 100% fresh air into the grow room and eliminating bad odors, harsh tastes, and
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Mars Hydro 4 Inch Inline Duct Fan and Carbon Filter Combo with Thermostat Controller