2 Pack 4 Inch Inline Duct Fans With Duct Clamps,110 CFM Ventilation Exhaust Fans HVAC Vent Blowers For Grow Tent ,Energy-Efficient

Say Goodbye to the Stale Air Need to maintain the temperature in your mini greenhouse/grow tent Looking to reduce room humidity and improve air circulation Need an exhaust fan that is powerful while quiet for a large space Contains two 4-inch duct fans and 2 duct clamps, powerful air circulation with low noise, our product may be the solution to solve your troubles.