The ECC99075EU with Soldering Wires RoHS Made by MECHANIC is an electronic part designed for soldering and repairing. It has a lead-free construction, with a pure copper core and fine silver plating to ensure a reliable connection. The soldering wires are RoHS compliant, meaning that the material used to construct them did not contain any hazardous material that could cause harm to the user. The wires are also highly flexible and durable, making them suitable for a variety of applications. In addition, the soldering wires are non-corrosive, which ensures that they will not damage or degrade any surface they come in contact with over time.