To use this heat shrink kit, first pick the right size tube for your quad part. Slide the tube over the area you want to cover. Then use a heat source, like a heat gun, to shrink the tube. Make sure to move the heat source around evenly to avoid uneven shrinking. When using the heat gun, keep it at a safe distance to prevent melting the tube. After use, store the kit in a cool, dry place to keep the tubes in good condition. If the tubes get dirty, you can gently wipe them with a dry cloth.