The gram of zinc layer of galvanized steel coil with flower is generally 40g, and that of galvanized steel coil without flower is generally 80g. The higher the grams of zinc layer, the longer its service life. In addition, most of the steel mills producing galvanized steel coils without flowers are state-owned big factories, and their substrates are relatively high in quality and have a perfect after-sales treatment system, so the price is higher than that of galvanized steel coils with flowers.