HPS extruded high temp 7mm blue silicone vacuum tubing hose is commonly use for vacuum advance systems, turbo systems, coolant systems, emission control, and temperature range applications. HPS Silicone Vacuum hose is made of Premium grade Silicone. HPS black 7mm silicone vacuum hose is ultra flexible and has excellent tensile strength. The heavy wall design gives it the ability to handle extreme pressure. Great for racing, race car fabrication, custom intake or turbocharged application.