Bought this to replace one that had two flaps with a spring to keep it closed but it clattered with gusts, this one doesn't. Great value
Brilliant product, speedy service as well as an excellent price
Back Draft Shutter Duct Connector
Sufficiently well made to last and no springs so nothing to rust away. Works well to stop draughts and save energy. A very cheap saving.
Received the back draft shutter, installed and it works as advertised