The difference between magnetic and non-magnetic pillar insulators is quite large, mainly due to their use environment and lack of control ability for capacitive current, as well as conductive performance, which is explained as follows:
The difference between the magnetism and the non-magnetism of the pillar insulator is the influence of the two kinds of material ions on the external factors in the process of movement and the operation of the circle. This means that the material of the pillar, if magnetic (such as cast iron), will heat up when exposed to an alternating current field. If the non-magnetic material (such as cast aluminum) will not have this phenomenon.
The above is the difference between magnetic and non-magnetic pillar insulators, I hope to help you!