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Adds a broad spectrum of premium organic nutrition and beneficial microbiology
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Ac Infinity, Inline Duct Fan Silencer, 4-Inch Blusoak System Kits Press the "On" buttonA duct muffler designed for use with inline fans in grow tents, bathroom fans and other HVAC applications. Features dual aluminium flanges to help absorb sound waves from fan vibrations and airflow. High quality neoprene foam in an egg crate pattern that will reduce fan noise by up to 50%. Galvanized steel body that is corrosion resistant and can withstand extreme temperatures. Duct Opening Diameter: 4 inches Length: 15 inches Weight: 2. 30 pounds