Scale Ruler Set of 2, silver and red. From Sekisui House. ● Scale Markings * 1:100 = 150mm (max) * 1:200 = 300mm (max) * 1:300 = 450mm (max) * 1:400 = 600mm (max) * 1:500 = 750mm (max) * 1:600 = 800mm (max) penco