The 4 X 3-1/2" BLK MI HEX BUSHING by SERVICE METAL PRODUCTS is a durable fitting designed for pipe size transitions. Made from high-quality black malleable iron, this hex bushing offers excellent strength and corrosion resistance. With dimensions of 4 inches by 3-1/2 inches, it is ideal for various plumbing and industrial applications. The hex design allows for easy installation and secure connections. This bushing meets industry standards for safety and performance, making it a trusted choice for professionals seeking reliable components.