Duct Fan Silencer 4 - Duct Fan Silencer for 4" Duct Fan water-filtration This formula ensures optimum growth

This formula ensures optimum growth

The DEEP BREATH/G10 combo boosts yields to unheard of levels

and foundation(micronutrient) format

RAW = SOLUBLE FULLY LOADED RETAIL DISPLAY

Duct Fan Silencer 4 - Duct Fan Silencer for 4" Duct Fan water-filtration This formula ensures optimum growthA 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