The 4" Cast Iron Cleanout with a 3-1/2" Countersunk Brass Plug from Braxton Harris is designed for efficient drainage and maintenance in plumbing systems. Constructed from durable cast iron, this cleanout provides excellent strength and resistance to corrosion. The 3-1/2" countersunk brass plug allows for easy access and secure sealing, ensuring reliable performance. This cleanout meets industry standards for quality and is suitable for both residential and commercial applications, making it an essential component for effective plumbing maintenance.