{"product_id":"dayton-3hhl4-backdraft-damper-vert-horiz-mtg-7-3-4-sq","title":"Dayton 3HHL4 - Backdraft Damper,Vert\/Horiz Mtg,7 3\/4 Sq","description":"\u003cp\u003e7.75 In.H-W 4.5 In.L Aluminum Backdraft Damper, Damper Application Backdraft, For Nominal Duct Diameter 8 in, Frame Material Galvanized Steel, Number of Panels 1, Maximum Air Velocity 2000 fpm, Overall Height 7 3\/4 in, Rough Opening Diameter 8 in, Rough Opening Shape Square, Fits Fan Diameter 8 in, For Duct Shape Square, Free Area 0.3 sq ft, Overall Width 7 3\/4 in, Frame Material Thickness 20 ga, Overall Length 4 1\/2 in, Frame Depth 2 in, Rough Opening Length 8 in, Maximum Pressure 1 in wc\u003c\/p\u003e","brand":"DAYTON","offers":[{"title":"Default Title","offer_id":43253581840478,"sku":"3HHL4","price":36.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/Z-1IJxfo5oy_95cd9318-0726-4308-8316-8ab9d4a2362b.jpg?v=1788381317","url":"https:\/\/nationalboilersupply.com\/products\/dayton-3hhl4-backdraft-damper-vert-horiz-mtg-7-3-4-sq","provider":"National Boiler Supply","version":"1.0","type":"link"}