Silicone Heater Hose SAE J20 R3 Silicone Heater Hose meet or exceed the requirements of the SAE J20 R3 Class A specification. The silicone hoses are reinforced with 1-ply polyester fabric. Designed to withstand elevated temperatures, these hoses are polyester-reinforced. Silicone Heater Hose has a working temperature range of -54 degrees C to +200…