The 6061-40 3-1/2 X 5-1/2 Aluminum Nipple from Merit Brass is crafted from high-quality 6061 aluminum, known for its strength and corrosion resistance. This nipple is ideal for various plumbing and industrial applications, providing a reliable connection in both water and air systems. With dimensions of 3-1/2" x 5-1/2", it fits standard fittings and is lightweight for easy handling. Its durable construction ensures long-lasting performance, making it a preferred choice for professionals seeking quality and reliability.