Rev9Power Rev9_SS-350-BLACK; Silicone Hose Straight Coupler 3.50 Inch(Black) Product Details straight silicone 3.50" inner diameter: 3.50" total length: 3" thickness: 5mm Temperature Rating: -65F to 500F Pressure Rating: 150-275 PSI 4 layer polyester reinforced High temperature silicone hose. Good for Turbo, intercooler BEST for turbo application.