The Grand Rock 409 Aluminized Coated Stainless Steel 4 In I.D/O.D Diameter 45 Degree Elbow Pipe is a practical and reliable choice for various makes and models. Made from 409 stainless aluminized material, this 14-gauge pipe offers durability and longevity. With a 4-inch ID/OD and a 9-inch length on each side, it provides a perfect fit for most applications. The 4.5 center line radius ensures smooth airflow and efficient performance. This product does not have a bright finish, making it a discreet and functional addition to any system. Sold individually, it offers convenience and value.