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Using Doctor Ben's
Scale Tunnel Portal
#9110®
As a single component of Doctor Ben's Scale Consortium, the Scale Tunnel Portal #9110 is an original master creation utilizing the Original Doctor Ben's #8880 (3/32") Baby Building Blocs to create a portal that is easily applicable in scales N to G! The following image shows this Scale Portal as a vehicle tunnel in 1/64 scale. Eventually, we will have portals for all scales.

The overall dimensions of this Tunnel Portal are 5" wide by 4.5" tall and 1.2" thick. The NMRA Standards HO Scale opening is 3" tall by 2 11/16" wide. The individual 3/32" BBBs are staggered as not to overlap joints.
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