AC Infinity Inline Duct Fan Silencer, 4" SHIP_FR20 The front of the meter

The front of the meter has two buttons

Flexible Feeding Methods

minimum speed

Pro-Mix® HP

The result is crystal clear

AC Infinity Inline Duct Fan Silencer, 4" SHIP_FR20 The front of the meterAC Infinity Inline Duct Fan Silencer 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