Merrill Steel Male Adapter, 1-1/2 In. Insert x 1-1/2 In. MIP is designed for use with polyethylene pipe. It’s made of galvanized steel, which provides durability and corrosion resistance. This type of adapter allows you to transition from a polyethylene pipe to a threaded connection, making it useful in various plumbing and water supply applications. It provides a secure and leak-resistant connection when properly installed.