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Professional-quality scales made from high-impact plastic with white, non-reflecting, matte faces and tapered edges. Machine-engraved graduations and color-coded furrows. Supplied in hard plastic case. Mechanical drafting scales have the following graduations: 1/8, 1/4, 1/2, 1 inches to the foot; 1/4, 3/8, 1/2, 3/4 size; 50ths and 16ths.
Alvin 244P 12" High Impact Plastic Mechanical Drafting Triangular Scale - B000HF0HC4