Grand Brass Lamp Parts, LLCStaff Answer
Aug 31, 2026 - 07:19 AM
Thank you for your question. The 1-1/8in measurement is the outside diameter (OD) of the tubing, not the inside diameter.
The tubing has an approximately 0.020in wall thickness, so the calculated inside diameter is approximately 1.085in (about 1-3/32in).
Please note that the inside diameter is calculated from the nominal outside diameter and wall thickness and should be considered approximate and for reference only.
