Staedtler Mars 12" Plastic Engineer Ruler, White (987 18-34BK)
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- Triangular scale is ideal for engineers and is also a versatile measurement tool for architects
- Fully divided scale with 10, 20, 30, 40, 50, 60 parts per inch
- Features color-coded grooves to provide quick as well as accurate selection of the desired scale
- Offers three sides with six different scales that feature die-engraved graduations
- Made of white, high-impact polystyrene plastic