Duct Fan Silencer 4 - Duct Fan Silencer for 4" Duct Fan ventilation Recommended for larger

Recommended for larger

These highly porous large stones are lightweight

Dilution Solutions Nutrient Delivery System (NDS) – DAB Starter Kit – 3/4 in (HYKSTART-DAB)

Comes with GL45 screw cap to prevent leaks

The pH level of soils or substrates strongly influences crop performance

Duct Fan Silencer 4 - Duct Fan Silencer for 4" Duct Fan ventilation Recommended for largerA 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