At some point, the interior diameter of the Jotter was reduced and a new refill introduced.
Until about the middle of the last century, shotgun barrels were nothing more than cylindrical tubes with the same interior diameter their entire length.
It is a hollow hoop with an interior diameter of 80 to 90 cm.
These values for size do not indicate the interior diameter, which is critical for fitting to the spokes.
This allows the center to be used in the bore of a pipe or other workpiece with a large interior diameter.
The main supports for the cabins were two tough plastic rings just over half the interior diameter of the passenger module.
The interior diameter is from 51 to 90 cm, and the hoop must weigh a minimum of 300g.
The bore is the interior diameter of the barrel.
Though the lighthouses are conical, their interior diameter is 10'6 throughout.
It had an interior diameter of three inches.