![Gravity Vent 100mm x 150mm](http://www.prsupplies.co.uk/cdn/shop/products/GRAVITY-GRILLE_{width}x.jpg?v=1620300660)
- Non-return shutter flaps close automatically when not in use.
- Stops unpleasant odours, noises, or draughts flowing back through your duct.
- Wipe-clean UV stabilised design for indoor or outdoor use.
- Easy to install & durable.
- Compatible with 100mm round ducting