Ultimate quality silicone marine exhaust and water hose. Very high temp. 4 to 6 ply polyester reinforcement 350 degreesF (177 degreesC). Exceeds all standards and lasts up to 6 times longer than black rubber. SAE J2006 R1, ABYC and NMMA. 10 year warranty. Lloyds registry type approved. ID 6" Length 36"