Do you have the measurements for Inner Diameter, Outer Diameter, and glass wall thickness for it? Plus a pix? It might be a molded tank. The ProTank has this goofy indent at the top... and the tank glass itself is super thin to accomodate a tool to shape the top with the indent. Makes it REALLY hard to make a replacement tank for. Is the KirF like that? I don't even know what a KirF looks like.
It's not molded like the pro tank. Straight tube with the cap ends bored out to a little larger ID.
OD 22.73mm
ID 20.21
Length 29.85
The glass thins at the caps. Not necessary for a replacement but that is how the pmma tanks are made.
thickness at the caps 1.26
thickness between the caps 1.6