30cm 247P Plastic Metric Scale 1:20, 1:33 1/3, 1:40, 1:50, 1:100

247P metric scale rulers are 30cm in length and made of high-impact plastic. These Alvin scales have a non reflecting white matte faces, color coded furrows, and black graduations that are machine engraved into them. Use the scales for designing and reading metric architectural & engineering drawings Graduations: Metric 1:20, 1:33 1/3, 1:40, 1:50, 1:100