The 4" Octagonal Extension Ring Drain with a depth of 1-1/2" and both 1/2" and 3/4" knockouts in red from Southwire is designed for versatility and durability in electrical installations. This extension ring is made from high-quality materials, ensuring compliance with industry standards. Its octagonal shape allows for easy installation and secure mounting, making it suitable for various applications. The vibrant red color enhances visibility, making it an excellent choice for both residential and commercial projects, providing electricians with a reliable solution for enhancing electrical systems.