Hydro Crunch 6 inch 240 CFM Booster Fan & 6" x 12" Carbon Filter Hydroponic Ventilation Set Hydro Crunch Booster Fan & Carbon Filter Combo 6" Hydro Crunch 6" Booster Fan x 1 Hydro Crunch 6" Carbon Filter x 1 Removes odors and airborne carcinogens Easy to use and install