1. Inner diameter (ID): 25mm. 2. Thickness: 1.5-3mm. 3. Bursting Pressure: 2 Mpa. 4. Working pressure: 0.3 Mpa (43.5 PSI) at 0.9 Mpa (130.5 PSI). 5. Operation Temperature Range: -60C to 260C (degrees). 6. Silicone tube with non-toxic, environmentally friendly, high transparency, resilience, compression-resistant permanent deformation, UV resistance, flame retardant and other characteristics. 7. Heat resistance: Silicone rubber has much better heat resistance than ordinary rubber and can be used almost forever without performance change at 150C(degrees). 8. Universal for racing car: air inlet / admission tubes.