Check the listing for details. Hyperfan Stealth 6" Silenced Inline Duct Grow Fan, NO Speed Controller. Used. Condition: Used. Listed at 79.99 USD. *No original speed controller, lost in a move.* The Hyperfan Stealth 6" Silenced Inline Duct Grow Fan is a powerful and efficient ventilation system designed for indoor use. With a quiet operation, this fan provides effective exhaust ventilation while keeping noise levels minimal. Made of durable aluminum material, this corded fan with a 60 Hz power frequency is suitable for hydroponics setups and can be easily hung from the ceiling. The circular vent style and 6-inch diameter make it ideal for circulating air in small to medium-sized spaces, making it a valuable addition to any home or garden. Unit is used but still works great. *Check my other listings, more equipment available not listed, and msg with any questions.* Thanks for looking