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For straight connections in wet exhaust systems or engine water circulation lines. Blue silicone cover with smooth finish for easy clean up. Flexible - easy to install 4 -plies of synthetic fabric. Stable at elevated temperatures. Resistant to: exhaust fumes, ozone, mild chemicals, antifreeze, salt water. Temperature range: -20°F to +350°F. Meets SAE J2006 Type R. Meets ISO 13363:2004 - Type 2 - Class B.