Metric civil engineering drafting scale ruler. Professional quality, 30cm metric engineer's scale is made from high-impact plastic with white, non-reflecting dull-matte faces, and tapered edges. Hot-stamped graduations and color-coded furrows. Supplied in hard plastic case. Civil engineering graduations (1:100, 1:200, 1:300, 1:400, 1:500, 1:600). Alvin 743PM metric civil engineers scales are made in Germany.