S&P TD Series Inline Fan. Integrated Mounting Bracket Included. Usually ships within 1-2 Days. For 6 inch round duct - 293/218 cfm (high/low). 1 to 4: $127.00Yup, these are the real deal. Super compact, mounts very easy, ultra silent & more importantly they move a LOT of air. Way more silent than Vortex & Cap fans. I put pics below.