f7be973c__All_In_One_Grow_Box___Dealzer__What_s_the_Difference_
[Yielder Max] 4" Circulation Fan [Other Grow Cabinets] 4” Desk Fan, or None [What's the Difference?] 
Strengthens plants to increase yield and circulates fresh air throughout the cabinet
Yielder Max - 12 Plant All In One Grow Box - Dealzer
What's the Difference?