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See The New Mathomat R300 Ruler
CTM9412 Ratios: 1: 5,10,20,50,100,200,500,1000 - Hand scale ruler, 300mm
CTM9412 Ratios: 1: 5,10,20,50,100,200,500,1000 - Hand scale ruler, 300mm
CTM9412 Ratios: 1: 5,10,20,50,100,200,500,1000 - Hand scale ruler, 300mm
CTM9412 Ratios: 1: 5,10,20,50,100,200,500,1000 - Hand scale ruler, 300mm
CTM9412 Ratios: 1: 5,10,20,50,100,200,500,1000 - Hand scale ruler, 300mm

CTM9412 Ratios: 1: 5,10,20,50,100,200,500,1000 - Hand scale ruler, 300mm

$7.95 AUD