Duct Fan Silencer 4 - Duct Fan Silencer for 4" Duct Fan ventilation mycorrhizae are especially beneficial toward:

mycorrhizae are especially beneficial toward: tomatoes

intense light coverage with its 8 passively cooled LED bars allowing you to use it in low rooms

(NOTE: Not compatible with MAC systems

These highly porous large stones are lightweight

Recommended for larger

Duct Fan Silencer 4 - Duct Fan Silencer for 4" Duct Fan ventilation mycorrhizae are especially beneficial toward:A duct muffler designed for use with inline fans in grow tents, bathroom fans and other HVAC applications. Features dual aluminum 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