{"product_id":"johns-manville-638339-3-4-in-x-48-in-x-48-in-calcium-silicate-high-temperature-insulation","title":"Johns Manville 638339 - 3\/4 in x 48 in x 48 in Calcium Silicate High Temperature Insulation","description":"\u003cp\u003eHigh Temperature Insulation, Density 40 lb\/cu ft, Facing Material Unfaced, Flexibility Not Applicable, Foam Cell Type Closed, Form Board, Insulation Color White, Insulation Material Calcium Silicate, Maximum Operating Temperature 1,700 Degrees F, Minimum Operating Temperature 0 Degrees F, Overall Length 4 ft, Width 4 ft, R Value 0.77, Thickness 3\/4 in, Standards ASTM C656, C795, E119, E136, E72, E84, NFPA251, UL 1479, UL 1709, UL 263, Water Vapor Absorption Minimal\u003c\/p\u003e","brand":"JOHNS MANVILLE","offers":[{"title":"Default Title","offer_id":43255131078750,"sku":"638339","price":461.06,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/Z_xC0xkcpEx_8f859f27-6f38-401c-a719-be0f99cef800.jpg?v=1788401069","url":"https:\/\/nationalboilersupply.com\/products\/johns-manville-638339-3-4-in-x-48-in-x-48-in-calcium-silicate-high-temperature-insulation","provider":"National Boiler Supply","version":"1.0","type":"link"}