Details: 3-ply Silicone Coolant Hose Flexfab?s 3-ply mandrel made silicone coolant hose connects radiator to engine block for coolant delivery. Ideal for extreme temperatures and various pressures where high performance is a must. For heavy duty pressure connections in hostile engine environments. Resists hardening, cracking, cold leaks, aging, steam and many chemicals. Ideal for extreme temperatures and various pressure ranges where high performance levels are required. Stocked in 3 Foot Lengths Construction: ? Silicone hose with 3-plies of Polyester Reinforcement Specifications: ? Meets or exceeds the operating requirements of SAE J20 R1 ? Meets or exceeds the operating requirements of TMC RP303B Class I Grade II ? Temperature range is -65°F (-54°C) to +350°F (+177°C) ? Custom Wall Thickness is .140?/.190? Applications: ? For heavy duty pressure connections in hostile engine environments ? Resists hardening, cracking, cold leaks, aging, and many chemicals ? Ideal for extreme temperature and various pressure ranges where high performance levels are required