Squirrelly 2.5" Inch Silicone Black Coupler 3 Layers of Polyester Reinforcement Suitable High Level U 180 Degree Soft Hose Turbo Pipe Air Intercooler Piping Squirrelly's line of silicone couplers feature 3 layers of polyester reinforcement and are suitable for applications with boost pressures up to 45psi. They also feature a temperature rating of 428F for direct to turbocharger installations. Features: Squirrelly's line of silicone couplers feature 3 layers of polyester reinforcement and are suitable for applications with boost pressures up to 45psi. They also feature a temperature rating of 428F for direct to turbocharger installations. Material: 3-ply Polyester Reinforced Temp: 428 Degrees F (220 C) "U" 180 Degree Bend 2.5 Inches ID