There are many types of chains. They are divided according to the shape appearance, which can be divided into short ring chains, toothed chains, roller chains, flat top chains, and so on. There are also different divisions of the ring chain according to the level, such as the 30 -level lifting chain, the 43 -level lifting chain, the 60 -level lifting chain, the 70 -level lifting chain, the 80 -level lifting chain, the G80 lifting chain, the import 100 level level 100 The lifting chain represents the different gravity of the same chain ring diameter. The higher the level, the better the gravity. The 80 -level chain is made of 20mn2 alloy steel.