Filter Kit Add-On for standard Weather-Tight Vent. Comes with 2 filter pads and 1 Velcro strip to apply on an existing vent.
Installation is simple:
1) Remove the top of vent and insert Velcro strip on inside of vent top (end to end)
2) Install filter pad on Velcro making sure it sticks firmly
3) Put the Vent top back on the bottom.
*Filter kit does not work on Wind Power vents.*