Don't just move air around, create a Vortex! Use this kit to update your old, inefficient power vent without replacing the entire vent or compromising the rooftop seal. Just replace the existing screen with the Vortex upgrade kit. This will give you a 9 inch blade on the fan for more air movement. It is easy to install with only a Phillips head screwdriver. Non-powered vents can be converted but would need to have additional wiring done (not included). This kit works with most 12 Volt vents with radius corners, including Ventline, Jensen, Elixir and all Hengs powered US Vents *NOTE: Please call if you have any questions. White in color.