YJ RACING 3" to 4" Black Color Professional Straight Reducer Silicone Turbo Hose Coupler Intercooler 76mm to 102mm 100% Brand New. Never been used.Made of high quality silicone material Working Temperature:-76 F (-60 C ) to +500 F (+260 C) Working Pressure:0.3Mpa (43.5 PSI) to 0.9Mpa (130.5 PSI) Thickness: 5mm. 3ply polyster reinforced Hose Inside Diameter: 3"&lt;4" inch