Southland 3/4" Ground Joint Black Iron Union is a high-quality black malleable iron union featuring an inserted brass seat for enhanced durability. Each fitting is individually flag-tagged and proudly displays the Mueller logo cast into the body, ensuring ity and superior craftsmanship. These unions are imported and subjected to rigorous inspection and quality testing to reliable performance. I for plumbing and gas applications, this union provides a secure and leak- connection, making it a choice for professionals and DIY enthusiasts alike. Model Number: 521-704BG