Coolant High Pressure Silicone Rubber Hose Pipe For Hostile Engine Environments ORK High Temp Reinforced Silicone Straight Coupler Hose meet or exceed SAEJ20 standard, ideal for heavy duty pressure connections in hostile engine environments, extreme temperatures and various pressure ranges where high performance levels are required. Technical Specification Temperature Range:- 65 deg. F to + 350 deg. F (177 deg. C) Reinforced Layer: Multi-ply polyester Length: Available in 3",