HELIX TRIANGULAR METRIC SCALE RULER 300mm / 30cm / 12 inchComes Blister CardedTHREE COLOUR CODED SIDES: RED: 1:100 1:200 1:5 1:50 BLUE: 1:2 1:20 1:10 1:1 GREEN: 1:1250 1:2500 1:500 1:1000Durable White Plastic Triangular Ruler3 Colour Coded Sides, Each Side with Different Scales30cm / 12 InchesPerfect for Students and Professionals alike

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TRIANGULAR SCALE RULE

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