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: -20F to +350F. Meets SAE J2006 Type R. Meets ISO 13363:2004 – Type 2 – Class B.