This VIVOSUN inline fan is designed for grow tent ventilation and includes a smart controller for managing airflow in indoor growing setups. It is listed as new and ships with free shipping, which may help buyers comparing total cost. The fan is offered in 4-inch, 6-inch, and 8-inch size options, so choosing the right size for your tent or ducting setup is an important buying note. This item may suit growers looking to improve air movement, ventilation planning, or environment control in a tent system. If you are matching an existing setup, check the listing for full details on compatibility, size selection, and what is included. VIVOSUN 4"/6"/8" Inline Fan with Smart Controller for Grow Tent Ventilation. Condition: New. Listed at 57.59 USD. Aerozesh G G 4" Inline Fan w/ E12/E42A G 6" Inline Fan w/ E12/E42A G 8" Inline Fan w/ E12/E42A. Aerozesh S S 4" Inline Fan w/ E12/E42A S 6" Inline Fan w/ E12/E42A S 8" Inline Fan w/ E12/E42A. Aerozesh T T 4" Inline Fan w/ E12/E42A T 6" Inline Fan w/ E12/E42A T 8" Inline Fan w/ E12/E42A.Aerozesh G G 4" Inline Fan w/ E12/E42A G 6" Inline Fan w/ E12/E42A G 8" Inline Fan w/ E12/E42A. Aerozesh S S 4" Inline Fan w/ E12/E42A S 6" Inline Fan w/ E12/E42A S 8" Inline Fan w/ E12/E42A. Aerozesh T T 4" Inline Fan w/ E12/E42A T 6" Inline Fan w/ E12/E42A T 8" Inline Fan w/ E12/E42A.