First of all, we must follow the weight of the goods or the required load. If you need to connect with other components, you need parameters of other components. Generally, we say that the chain will be said to be a few thick. This refers to the diameter of the chain wire, and the inner width refers to the width inside the chain ring. There are also chains. There will be a chain standard load that indicates this specification. The experimental load and broken load of the chain. Here we should pay attention to the selection of the chain to choose from the standard load.