Amazon.com: Structural Pipe Fitting, DIY Outdoor - 1-1/2" Adjustable Ell or Tee, 80A-8, Aluminum Magnesium, Please note. ID of fitting is 1.925, to take nominal 1-1/2" steel pipe which all have an
Aluminum Alloy 32mm ID Round Tube Rack Pipe Fittings Connector Pack of 2 - Amazon.com
Tee, 1 1/4 in For Pipe Size, Structural Pipe Fitting - 54WK30|5E-7 - Grainger
Kee Lite Type L25 Aluminum Pipe Fittings - Three Socket Tees | Hoover Fence Co.
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". :