3/8 and 1/2 steel wire springs each have advantages. 3/8 has better flexibility and 1/2 has better hardness, which can be applied to different sewer specifications. You also need to pay attention to the specific number of bends. Generally, both 3/8 and 1/2 are suitable for sewer sizes of 50-100mm. The larger the diameter of the sewer pipe, the larger the spring size needs to be used.
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