Packaging identification
Need to look at its packaging logo, need to pay attention to the trademark, product logo, manufacturer's name, production date, etc. On the packaging, these need to be seen clearly. In addition, it should be noted that the storage period of coils is generally not more than one year.
Look at the bottom of the fetus
When buying, you need to tear the edge of the coil by hand to see if the tire base is consistent with the mark and completely saturated. There should be no unsaturated white marks or spots on the bottom of the tire. If it appears, it means that the quality of waterproofing membrane is also poor.