Architectural Triangle Ruler Set 12 Inch Scale 11 30/60 8 45/90 Triangles Pla...

Mr. Pen Architectural Triangular Ruler Set with 12 Inch Clear

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Precision Architectural Triangular Ruler Set - 12" Scale + 11" & 8" Triangles

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Architectural Triangular Ruler Set: 12" Scale & 11" 30/60, 8" 45/90 Triangles

Architectural Triangular Ruler Set: 12" Scale & Clear Measuring Triangles