I apologize that the improper communication with the applier devoted to the wrong information.
In fact, the applier can provide 35V type material, but the time for applying was quite long, thus the applier suggested to change to provide 50V type.
I had started to ask the applier to apply for sample for 35Vtype, I apologize again for the mistakes I made. I will do everything I can to avoid such mistakes in the future.