Saintograph Triangular Ruler 30cm Pre-Nursery Exceptionally smooth and consistent the

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Saintograph Triangular Ruler 30cm Pre-Nursery Exceptionally smooth and consistent the30cm 12" Professional Metric Plastic Triangular Scale Ruler 1: 10 1: 20 1: 25 1: 33 1: 50 1: 75 Length: 12", 30cm. Supplied in a rigid transparent box for easy storage and protection. Made of plastic with black letters and red and blue color stripes 2 scales on each side of the ruler covers most of the scales used on architectural and engineering drawings . High quality ruler for professional applications, architecture, engineering, technical drawing.