The surface of inferior products is not lubricated, and their strength and talent are very poor, which cannot be used for a long time. Poor quality fiberglass steel pipes are manufactured using inferior resin for processing. If the fiberglass tube splits, it will appear as if bamboo has cracked, while low-quality ones will appear as if chalk has broken.

From the appearance, we can also determine whether the color is clean. High quality fiberglass pipes do not contain many impurities inside, while low-quality products have a lot of impurities inside due to their dirtiness. Glass pipes with many black spots cannot guarantee their quality. Finally, we can take a look at whether there are any gaps in its cross-section. The gaps are caused by uneven pulling and squeezing force, and the machines used in low-quality products are not very professional, which often leads to such situations.