Reinforced Graphite Laminate with 316 Stainless Steel Wire Mesh Insert. Size 10" x 13" x 1/16" thick Graphite Sheet (1 sheet) Sterling Seal 7000SP is adhesive bonded and is made from Graphite Industrial Grade (99%carbon) Graphite has excellent salability that meets stringent emission regulations. Graphite meets most industrial fluid sealing service requirements Working Temperature Range: Oxidizing Environment, such as air: -400° F to 950° F (-240°Cto 510°C) Mild Oxidizing Environment of most gasket applications: -400° F to 1500° F(-240°Cto 850° C) Non-oxidizing Environment: Up to 1800° F, the limit of Stainless Steel Insert (Limit of Graphite is 5400° F)