External Aluminum Gravity shutters for heavy duty external use..
Select the size above to fit your plate fan or duct diameter.
200mm version: overall size is 267mm x 267mm
250mm version: overall si...
Plastic construction.
Fixed to outside of exterior wall
Air operated
Colour: white, brown, costwold stone (beige).
Grey now only available in 100mm and 150mm
Available sizes: 100, 125, 150mm...