Double-wide Tunnel for HO Scale Train Model Trains 4 inches wide (1

4 inches wide (1

The diameter of the circle that would be made by these pieces is 36" (any curved track you purchase should have a listed diameter)

But don't go too deep

Double-wide tunnel opening cross-section dimensions: 5

5 inches tall

Double-wide Tunnel for HO Scale Train Model Trains 4 inches wide (1A simple 3D printed plastic tunnel for an HO 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, and the radius is the radius of the curved track. For example, '15" radius, 30 degrees' means that each piece covers 30 degrees of a circle, meaning that 3 of them make a 90 degree turn. The radius of the circle that would be made by these