Vevor crawl space flood vent foundation flood vent 12 height x20 width wall ventreduce flood riskdetachable louvered plateeasy & convenient installationrigid zinc coated steelsurface paint treatmentdurable welding craftopening dimensions w x h : 20 x 12'' 508 x 304.8 Mm,thickness: 0.03'' 0.75 Mm,plug profile: wall,color: black,model: fhtfkgdby-20''x12'',item dimensions w x h x d : 22.05 X 14.17 X 1.02'' 560 X 360 x 26 mm,material: zinc coated steel,net weight: 4.85 Lbs 2.2 Kg
