3 inch (76 millimeter) 4-ply Reinforced High Temperature Straight Silicone Coupler Hose Black features 4-ply reinforced and knitted premium polyester fabric with high temperature silicone rubber, engineered for extreme temperature and various pressure ranges where high performance levels are required. Silicone couplers are commonly used for joining two hard pipes while reducing the possibility of connections coming apart or having your hard pipes or other equipment break. Coupler Specs are as follows. 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.Luxury RC