Made of metal and plastic. The heat dissipation design is well-thought-out, resulting in better heat dissipation. After-sales service: If you encounter any problems, our team will help you solve them as soon as possible. For Yamaha YP250 for Majesty XJ600N WR125R The voltage regulator is made of metal material, which is waterproof, not easy to deform, and durable. Sturdy and reliable. Better heat dissipation-appropriate heat sink design, better heat dissipation, ensuring a longer service life at normal temperature