This TroubleShooter is made from a resin of unknown origin that I am calling Tiger Flame.
It is shown fitted with a Jowo No6 gold plate nib with a "Rockster red" accent ring at the grip. (Other nib options are available).
The 1313 is a medium sized pen with no step between the 13mm cap threads and the remainder of the barrel. The grip section is slightly pinched to ≈12mm diameter at its narrowest point. As these pens are all hand made there may be small variations on measurements.
Length - Capped ≈ 143mm, uncapped ≈ 134mm
It is provided with a high quality Beaufort Ink international standard sized converter. Standard ink cartridges can also be used.