The 8" Cast Iron Wing Nut Test Plug by Braxton Harris is designed for effective sealing and testing of plumbing systems. This durable test plug features a straight design and is constructed from high-quality cast iron, ensuring long-lasting performance. Ideal for use in various plumbing applications, it provides a reliable seal to prevent leaks during pressure testing. The wing nut design allows for easy installation and removal, making it a practical choice for both professionals and DIY enthusiasts.