The Sealfast CR 2515AL is a 2-1/2" Coupler x 1-1/2" Shank made from high-quality aluminum, ensuring durability and resistance to corrosion. This fitting is designed for secure connections in various applications, including plumbing and HVAC systems. The 2-1/2" coupler provides a robust interface for larger pipes, while the 1-1/2" shank allows for compatibility with smaller fittings. Its lightweight construction makes installation straightforward, and it meets industry standards for performance and reliability.