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See The New Mathomat R300 Ruler
CTM9812 Ratios: 1: 500, 1000, 1250, 1500, 2000, 2500 - Hand scale ruler, 300mm
CTM9812 Ratios: 1: 500, 1000, 1250, 1500, 2000, 2500 - Hand scale ruler, 300mm
CTM9812 Ratios: 1: 500, 1000, 1250, 1500, 2000, 2500 - Hand scale ruler, 300mm
CTM9812 Ratios: 1: 500, 1000, 1250, 1500, 2000, 2500 - Hand scale ruler, 300mm
CTM9812 Ratios: 1: 500, 1000, 1250, 1500, 2000, 2500 - Hand scale ruler, 300mm

CTM9812 Ratios: 1: 500, 1000, 1250, 1500, 2000, 2500 - Hand scale ruler, 300mm

$7.95 AUD