Amazon.com: Structural Pipe Fitting, DIY Outdoor, Use Imagination -1-1/2"Tee-E Short, 3T-8, Aluminum Magnesium, Note: ID of fitting is 1.925, to take nominal 1-1/2" steel pipe which all have an OD of 1.9". :
ALUMINUM PIPE FITTINGS HOME - ALUMINUM PIPE FITTINGS
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USA Industrials - Aluminum Pipe Fittings; Material Grade: Class 150 - 28852713 - MSC Industrial Supply
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USA Industrials - Aluminum Pipe Fittings; Material Grade: Class 150 - 28851988 - MSC Industrial Supply
USA Industrials - Aluminum Pipe Fittings; Material Grade: Class 150 - 28831733 - MSC Industrial Supply
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
USA Industrials - Aluminum Pipe Fittings; Material Grade: Class 150 - 28852531 - MSC Industrial Supply