The 4" No Caulk Cast Iron Drain with a 3-1/2" Metal Spud is engineered for efficient drainage in plumbing systems. This robust drain features a no-caulking design, simplifying installation and ensuring a leak-free connection. The cast iron construction provides exceptional durability and resistance to corrosion, making it suitable for both residential and commercial applications. With a 6" square brass strainer, this drain effectively prevents debris from clogging the system. Compliant with industry standards, it is an ideal choice for new installations or replacements.