All tunnel portals, bridge abutments and retaining walls are cast from a hard gypsum or plaster product.
They come unpainted in a bright white color ready to accept stain, paint and weathering powders.

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Browse reviews for Monroe Models 115 Abutment Wings Pkg(2), HO Scale
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Browse reviews for Monroe Models 114 Retaining Wall Pkg(2), HO Scale
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Browse reviews for Monroe Models 113 Double Tunnel Portal Random Stone, HO Scale
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Browse reviews for Monroe Models 112 Single Tunnel Portal Random Stone, HO Scale
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Browse reviews for Monroe Models 111 Double Tunnel Portal Cut Stone, HO Scale
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Browse reviews for Monroe Models 109 Single-Portal Blasted Rock, HO Scale
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Browse reviews for Monroe Models 108 Retaining Wall Random Stone 2/Pack, HO Scale
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Browse reviews for Monroe Models 107 Retaining Wall Fieldstone 2/Pack, HO Scale
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Browse reviews for Monroe Models 102 Abutment Wing Cut Stone 2/Pack, HO Scale