{"product_id":"louver-damper-adjustable-18h-x-18w","title":"Louver Damper Adjustable 18H x 18W","description":"\u003cp\u003e21 In.H 21 In.W Drnbl Extrd Alu Combo Dmpr Louver Type Combination Frame Type Flanged Outside Height 17 1\/2 in Outside Width 17 1\/2 in Rough Opening Height 18 in Rough Opening Width 18 in Louver Maximum Intake 779 cfm Maximum Exhaust 1 114 cfm Flange Width 1 1\/2 in Free Area 0.7 sq ft Beginning Point of Water Penetration 1 118 fpm Maximum Air Velocity 3 000 fpm Blade Angle 45 Degrees  Material Aluminum Inside Height 16 1\/2 in Inside Width 15 3\/4 in Number of Blades 3\u003c\/p\u003e","brand":"DAYTON","offers":[{"title":"Default Title","offer_id":40930203336788,"sku":"42S72A","price":698.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/3316\/7700\/files\/20UA07_AS01_27bda642-5cf1-46d8-9e55-f2e96b0f2019.jpg?v=1742532494","url":"https:\/\/jahnda.com\/products\/louver-damper-adjustable-18h-x-18w","provider":"The Jahnda Group - Your Government Supply Provider","version":"1.0","type":"link"}