All pins have the exact lengths and diameters of 19 mm and four mm, respectively. All pins are insulated. The design of Type J plugs stops polarity reversal. These plugs are rated at 10A. In Type I plugs used in China, the earthing pin is previously mentioned the other two https://typesofmicrophonesforinte49371.blogsvila.com/29481846/types-of-plug-tops-no-further-a-mystery