HPS 5/8 inch (16 millimeter) High Temperature Silicone Heater Hose meet or exceed the requirements of the SAE J20 R3-Class A specification. HPS silicone heater hoses are reinforced with 1-ply polyester fabric. HPS silicone heater hoses are resistant to coolant solutions, cold leaks, cracking, peeling, aging and ozone. HPS silicone heater hoses are used by professionals in industries such as high performance racing vehicles, commercial truck and bus, Marine, agricultural and off highway vehicles, turbo diesel, food and beverage, and general manufacturing industries. Temperature Range: - 65 degree Fahrenheit to + 350 degree Fahrenheit (177 degree Celsius). Silicone hose is compatible with water or anti-freeze such as coolant. Silicone hose is not compatible with fuel or oil.