High Performance Silicone Vacuum Hose - 25 feet - .1375" ID (3.5mm) - Black Manufactured in the US - Quality & satisfaction guaranteed .100" Wall Thickness - Nearly 3x the thickness of cheaper hose. If you don't see the wall thickness defined, don't buy it. High Temp & High Performance - This vacuum hose remains thermally stable at temperatures as low as -65F and as high as 500F SAE J20 and TMC 303B Certified - This hose conforms completely to the SAE J20 and TMC 303B standards for performance Perfect for all kinds of jobs - installing boost controllers, gauges, and much more