Review on AotoKoop Performance Silicone Vacuum Pressure by Steve Wynn

6 mm (or 1/4 inch) heat resistant hose for vacuum lines. Excellent seal with no staples and is easy to trim. The kit includes 5 feet which was enough for my car. The color is a nice mid blue and matches the other blue silicone parts in my engine bay. No complaints and it didn't melt at all, although one of the hoses right next to the turbo outlet and downpipe was among the hottest. parts in my engine. The silicone material is flexible and can stretch if needed to fit slightly larger fittings.