Vent Cover Hit & Miss Adjustable OPEN & CLOSE Plastic Wall System Air Flow
For openings upto 229mm x 76mm (FREE AIRSPACE 2240mm). For openings upto 229mm x 152mm (FREE AIRSPACE 4680mm). For openings upto 229mm x 229mm (FREE AIRSPACE 6350mm). Includes 4 Hidden Fixing Points, In Each Corner On Rear Of Vent.