Amazon.com: Single Wall Stainless Steel Pre-Engineered Grease Duct- Used for the removal of smoke and grease-laden vapors. No on-site welding required. (10" Round Duct, Elbow 90 degree) : Tools & Home Improvement
Master Flow 3-1/4 in. x 10 in. Short Way 90 Degree Rectangular Elbow 90E3.25X10 - The Home Depot