Growsun Air Carbon Filter and Odor Control with Activated Virgin Charcoal for Inline Fan, 6 By 16-Inch, Pre-Filter Included 6 By 16-Inch Carbon Filter For Grow Tent Equipment Include Pre-filter for Removing Dust And Airborne Particles Thickness Of 1.5 Inches Activated Virgen Carbon, Removes 99.5% Of Volatiles From The Air Odor Control For Better Growing Enviroment Brings Fresh And Cleaner Air For Plants