Photo 1 of Architectural Scale Ruler, 12'' Imperial Architect Scale, Engineer Scale Ruler for Blueprints, Aluminum Triangle Drafting Ruler (Blue)

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Photo 1 of Architectural Scale Ruler, 12'' Imperial Architect Scale, Engineer Scale Ruler for Blueprints, Aluminum Triangle Drafting Ruler (Blue)Photo 2 of Architectural Scale Ruler, 12'' Imperial Architect Scale, Engineer Scale Ruler for Blueprints, Aluminum Triangle Drafting Ruler (Blue)