50' Roll Venair 3/4"ID Silicone SAE J20R3 Class A Heater Hose 50' Roll Venair 3/4"ID (inside diameter) Silicone SAE J20R3 Class A Heater Hose Polyester braiding - Outperforms standard rubber hoses For use in automotive heating and cooling systems Operational Temp Range -60C to 180C (will also sustain up to 200 for short periods of time) ALWAYS FREE SHIPPING!