The 4 X 4-1/2" Standard Black Steel Nipple from Service Metal Products is a versatile fitting designed for connecting two pipes in various applications. Made from high-quality black steel, this nipple offers excellent strength and resistance to corrosion. Its standard dimensions make it compatible with a wide range of piping systems, ensuring a secure fit. Ideal for use in plumbing, gas, and HVAC systems, this nipple is rated for standard pressure applications. It meets industry compliance standards, making it a reliable choice for contractors and industrial use.