Known barrel lengths
No kit-specific length has been indexed for this class yet.
12.5 mm tube class
A 12.5 mm nominal drilling and tube class. Known kit lengths are listed independently because nominal diameter alone does not make tubes interchangeable.
12.5 mm12.5mm
Observed outside diametersNot measured
Known kit lengths0
Linked kits / projects0
Replacement listings0
Match OD, wall thickness, and length.
The class name helps discovery; it does not override the kit maker's current tube specification. A close drill size does not prove that two brass tubes are interchangeable.