Features: Coupler Size: 3 to 3-1/2 Coupler Length: 3 Temperature: 428 Degrees F (220 C). 4-ply Polyester Reinforced. Includes 2 T-bolt clamps(92mm,100mm) Package include: 3 to 3-1/2 Silicone Coupler 4 Layers of Polyester Reinforcement Suitable Pipe Intake Turbo Intercooler with 2x T-Bolt Clamps(92mm,100mm) Silicone couplers feature 4 layers of polyester reinforcement and are suitable for applications with boost pressures up to 2mpa. They also feature a temperature rating of 428¡ãF for direct to turbocharger installations. Our product meet rigorous standards and have been field tested time and time again.