| Duct Size: | 5" |
|---|---|
| Material: | Plastic |
| Color: | White |
| Warranty: | 1 Year |

Both inlet and outlet are 9.125" X 9.125". Mine is installed through a trim board that is 9.25" wide and it just fits.
The cap is 9" square.
The cap on both the Supply and Exhaust caps is 9-1/8" square. So if for example you were mounting them side by side as close as possible, you would need to make the holes for the 5" ducts 9-1/8" apart on center. (Personally I would go a little longer for "wiggle room") I bought this pair of hoods/ducts with the intention of using with my portable A/C unit in an outdoor workshop. I never did use them because I ended going with a split A/C system instead. So, I have this pair of hoods/ducts for sale, if you're interested contact me at ****@***.***.
The manufacturer recommends that you use the RSK5 backdraft damper in the duct.