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because the outer shell is only about 1 mm thick
6 inches wide (2
The curved variations list the degrees of a circle they cover
A simple 3D printed plastic tunnel for an N-scale train track
A simple 3D printed plastic tunnel for an HO-scale train track
Tunnel for O Scale Train Model Trains because the outer shell isA simple 3D printed plastic tunnel for an O scale train track. Variations: Straight variations are straight, and their length is the listed number. The curved variations list the degrees of a circle they cover. For example, 'O 36, 30 degrees' means that each piece covers 30 degrees of a circle, meaning that 3 of them make a 90 degree turn. The diameter of the circle that would be made by these pieces is 36" (any curved track you purchase should have a
