Versatile, 3 sides with 6 different scales, 12" length, white solid plastic, die-engraved graduations, regular and color-coded grooves.
Scale models available:
987-18-1 1:20, 1:25, 1:50, 1:75, 1:100, 1:125
987-18-4 1:100, 1:200, 1:250, 1:300, 1:400, 1:500
987-18-31 1:3/32", 3/16", 1/8", 1/4", 3/8", 1/2"
987-18-34 1:10, 1:20, 1:30, 1:40, 1:50", 1:60"
987-18-ISO 1:1, 1:2, 1:5, 1:10, 1:20, 1:50