Duct Fan Silencer 8 - Duct Fan Silencer for 8" Duct Fan grow-systems-trays-reservoirs With 12% available phosphorous and

With 12% available phosphorous and 20% available calcium

California and are designed for optimum root penetration

and flat screw heads

High quality product

Spring loaded action automatically opens blades after each cut allowing for quicker multiple cuts

Duct Fan Silencer 8 - Duct Fan Silencer for 8" Duct Fan grow-systems-trays-reservoirs With 12% available phosphorous andA 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: 8 inches Length: 27 inches Weight: 6. 00 pounds