ASC Anvil 1/2"x3/8" Galvanized Reducing Coupling. It is made of durable malleable iron with a galvanized finish for corrosion resistance. This coupling is designed to connect two pipes of different diameters, providing a secure and reliable connection. It is suitable for use with water and oil applications. Anvil International offers a broad range of Steel Pipe Couplings in galvanized finish, meeting strict quality standards.