What is the difference between the high voltage cables with connector of 75KV and the high voltage cables with connector of 90KV?

The high voltage cables with connectorof Newheek are divided into 75KV and 90KV respectively according to the voltage. In general, the high-voltage cables of 75KV and connector are suitable for the X-ray machines of 125KV.The high voltage cables with connectors of 90KV are suitable for 150KV X-ray machines.The 75KV high voltage cable can also be used for 150KV X-ray machines, but Newheek is not recommended for longer service life.The high voltage cables with connector with connectors of 90KV cannot be used in the X-ray machine of 125KV.To keep the X-ray machine in good condition.