SteelTek 1-1/4-in 90-Degree Structural Galvanized Elbow in the Structural Pipe & Fittings department at Lowes.com
Amazon.com: Structural Pipe Fitting, DIY Outdoor - 1-1/2" Adjustable Base Flange, 89A-8, Aluminum Magnesium, Note: ID of fitting is 1.925, to take nominal 1-1/2" steel pipe which all have an OD of