{"product_id":"dayton-20ck18-sleeved-fire-damper-square-steel","title":"Dayton 20CK18 - Sleeved Fire Damper,Square,Steel","description":"\u003cp\u003e7.75 In.H-W 12 In.L Spring Fire Dampr w\/Sleeve, Damper Application Fire, Frame Material Galvanized Steel, Number of Panels 1, Maximum Air Velocity 4000 fpm, Overall Height 7 3\/4 in, Rough Opening Diameter Not Applicable, Rough Opening Shape Square, Fits Fan Diameter Not Applicable, For Duct Shape Square, Free Area 0.2 sq ft, Overall Width 7 3\/4 in, Frame Material Thickness 22 ga, Overall Length 12 in, Connection Type Not Applicable, Frame Depth 12 in, Rough Opening Length Not Applicable\u003c\/p\u003e","brand":"DAYTON","offers":[{"title":"Default Title","offer_id":43257226461278,"sku":"20CK18","price":129.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/Z-o16ukcpEx_468c3be1-a758-45fa-8e28-23b9d51e87bc.jpg?v=1788413402","url":"https:\/\/nationalboilersupply.com\/products\/dayton-20ck18-sleeved-fire-damper-square-steel","provider":"National Boiler Supply","version":"1.0","type":"link"}