Heat Shield Cover Type Heat Shield Maximum Ambient Temperature 500 Degrees F Cover Width 5 in Cover Length 4 in Fastening System Quick Release Fabric Flap Standards ASTM C1129 ASTM C335 Reusable Yes Features CAD/CNC produced for Precise Fit and Finish Durable Construction Integral Fastener for easy On/Off Self-Contained removable reusable flexible Insulation System Thermal Insulation Energy Saver Device captures 80 Percent of Surface Radiant Heatloss For Location Indoor Outdoor