The 3" x 3-1/2" Black Iron Nipple from Braxton Harris is a robust fitting designed for various plumbing and HVAC applications. This black iron nipple is ideal for connecting two pipes in a straight line, ensuring a secure and leak-free connection. Constructed from high-quality black iron, it offers excellent durability and resistance to corrosion. This product meets industry standards, making it suitable for both residential and commercial use, ensuring reliable performance in demanding environments.