Using this AS3 silicone carb breather hose is easy. First, measure the length you need and cut the 3 - meter hose accordingly. Make sure to use a sharp cutter for a clean cut. When installing, connect it properly to the carburetor breather. As for care, keep it away from sharp objects to avoid punctures. Clean it regularly with a mild soap and water solution. In terms of storage, store it in a cool, dry place. Remember, this hose comes with a 12 - month warranty, so if you have any issues, contact us.