Spider Farmer Grow Kit 4" Inline Fan and Carbon Filter ComboDescription Powerful Inline Fan: This fan is constructed with a heavy duty plastic housing for superior durability, dust and waterproof hosing, oblique blades that increase airflow by 40%, and a single phase asynchronous motor that delivers powerful air movement while only consuming 59 watts. It also has a very low noise level, producing only 35DB, making it near silent. The fan comes with a variable speed controller for easy speed adjustments and it