Need serious air control for a grow tent, workshop, or smelly room? This VIVOSUN kit has you covered! It's a complete air filtration system that includes a powerful inline exhaust fan, a matching size carbon filter (to eliminate odors), and a speed controller so you can adjust the airflow from a whisper to full blast. You choose the duct size that fits your space: 4 inch, 6 inch, or 8 inch. The fan is black, corded for reliable power, and perfect for active exhaust ventilation. Everything comes brand new in its packaging. Get clean, fresh, and odor-free air circulating in no time!