The 3" No Caulk Cast Iron Drain with a 3-1/2" metal spud and 5" brass strainer from Braxton Harris is designed for efficient drainage in plumbing systems. This durable cast iron drain is built to withstand heavy use and resist corrosion, making it ideal for both residential and commercial applications. The no caulk design simplifies installation, ensuring a secure fit without the mess of sealants. This drain meets industry standards for quality and performance, providing reliable service for years to come.