The 4" Female Coupling x Female Iron Pipe Type D - Brass is a durable fitting designed to connect two pipes or components with female threads. Made from high-quality brass, this coupling ensures corrosion resistance and long-lasting performance in fluid and gas systems. It features female threads on both ends, with Female Iron Pipe (FIP) connections for compatibility with standard iron pipes. Ideal for use in plumbing, hydraulic, and pneumatic applications, it provides a secure, leak-resistant connection.