The 4" No Caulk Cast Iron Drain with a 3-1/2" metal spud and a 5" square nickel bronze strainer is engineered for efficient drainage in various settings. Constructed from high-quality cast iron, this drain is designed to resist corrosion and withstand heavy use. The no-calk feature simplifies installation, ensuring a watertight seal without additional caulking. The square nickel bronze strainer effectively prevents debris from clogging the drain, making it suitable for kitchens, bathrooms, and other areas requiring reliable drainage solutions, meeting industry standards.