.375
Tube is measured by outside diameter, pipe is measured by inside diameter.
NB = inside diameter of the tube. OD = outside diameter of the tube.
Less than an inch.
No. A choke tube slips into and screws to the muzzle end of the barrel. It can only decrease the inside diameter.
convex
Calipers measure the internal or external dimensions of something.
Any measurement smaller than 35mm. That measurement would depend on the thickness of the material making the tube
To measure the internal diameter of a tube, you can use a caliper, such as a digital or vernier caliper, by placing the jaws inside the tube and reading the measurement where they touch the inner walls. Alternatively, you can use a small ruler or measuring tape, but this may be less accurate. Ensure the tube is clean and free of debris for an accurate reading. For precision, take multiple measurements at different points along the diameter to account for any irregularities.
If the circumference of a circle is 75 inches, the diameter is: about 23.87 inches. (diameter = circumference divided by pi).
Tube diameter is 1" on that scope
The medical term for the inner diameter of a tube is "lumen."
inside