Designed to handle the heat and abuse of main engine exhaust, generator exhaust as well as engine coolant circulation and engine or generator intake. Blue silicone tube and cover with smooth finish for easy clean up. Wire reinforced - will not collapse under suction or in a bend. Corrugated cover - easy to bend for easy installation. Two ply construction - wire captured between fabric plies. Stable at elevated temperatures. Resistant to: exhaust fumes, ozone, mild chemicals, antifreeze, salt water. Temperature range: -20F to +350F. Meets SAE J2006 Type R2. Meets ISO 13362:2004 - Type 1 - Class B.