... which are gold plating.4. The shell of the products is nickel plating or cadmium plating, resisting corrosion of ... B, C, DM: pure sealing typeG: cadmium plating, no mark for nickel platingn: number of contact elements-9, 15, ... connection, L-bent panel connection, no mark for welding wire type Note: The shell No. ... corresponding with the number of contact element. For example, the number of shell E’s ...