The 3-1/2 X 7" STD Black Nipple by Service Metal Products is a standard fitting designed for various plumbing and industrial applications. Made from high-quality black steel, this nipple offers excellent durability and resistance to corrosion. Its dimensions are optimized for easy installation in piping systems, providing a reliable connection between two pipes. This product meets industry standards, ensuring compatibility with a wide range of systems. Ideal for both residential and commercial use, it is a versatile choice for any project requiring a robust piping solution.