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Best Choice Helix 
Helix K93X40 Triangular Scale Ruler, 30 cm The Helix 30cm triangular scale rule has 3 colour coded faces with markingsGALAMAX 
GALAMAX Architectural Scale Ruler, Aluminum Triangular Scale Ruler Standard Metric 1:20, 1:25, 1:50, 1:75, 1:100, 1:125, 【Premium Quality】New updated Triangular scale with chamfered edges, giving you a safety guarantee. Every design deservesLexziuo 
Lexziuo 2PCS 15cm Triangular Scale Ruler - Architectural Drafting Tools with 6 Scales (1:100/200/250/300/400/500) for En Precision Measurement Tool - The Lexziuo 2PCS 15 cm Triangle Scale features six professional scales (1:100, 1:200, 1:250EMSea 
EMSea Triangular Scale Ruler 30cm Black Aluminum Alloy Metric Ruler 1:20 1:25 1:50 1:75 1:100 1:150 for Architect Drafti [6 Metric Scales] : There are 3 sides with 6 scales, 1 : 20, 1 : 25, 1 : 50, 1 : 75, 1 : 100, 1 : 125, clear to read andBest Value WINTEX 
WINTEX Triangle Metal Scale Ruler - 30cm - Aluminium Architect & Design Metric Ruler for Architects or Engineers - 1:20, Durable Aluminium Metal Scale Ruler: The Wintex triangular ruler is made of strong and durable aluminium. As a result, tLicccccXin 
Triangular Ruler, 7.87 inches (20 cm), Drafting Set, Triangular Scale, Plastic, Drafting Supplies, Stationery, Office Us Large set of triangular rulers: Equipped with a 45/90-degree triangular ruler and one 30/60-degree oneLicccccXin 
Triangular Ruler, 11.8 inches (30 cm), Drafting Set, Triangular Scale, Plastic, Drafting Supplies, Stationery, Office Us Package Includes: 1 x 11.8 inches (30 cm) triangle ruler 30° x 1 45° x 1LicccccXin LicccccXin Triangle Scale (15 cm), Drafting Supplies, Scale Ruler, for General Use, Plastic, Special Scale Scale, Large, Measurement Range: Measurement range: 0-15cm, Shrinkage Rate: 1/100, 1/200, 1/250, 1/300, 1/400, and 1/500LicccccXin Triangle Scale (15 cm), Drafting Supplies, Scale Ruler, for General Use, Plastic, Special Scale Scale, Large Rate: 1/20, Measurement Range: Measurement range: 0-15cm, Shrinkage Rate: 1/20, 1/25, 1/50, 1/75, 1/100, 1/125STAEDTLER STAEDTLER 561 98-1BKST Triangular Triangular Din 1: 20, 25, 50, 75, 100, 125 Ruler Scale, (20497) A triangular reduction scale ruler with colour-coded grooves17% Off OwnMy OwnMy 3 Pack 30CM Solid Aluminum Triangular Architect Scale Ruler Set, 3-Colors-Groove Architectural and Engineer Scale What you will get (Metric Scale Type): 1 x 3 Color-coded groove Big Scale Architect Scale Ruler, 1 x 3 Color-coded groovSTAEDTLER STAEDTLER 561 98-4BKST Triangular Din 1: 100, 200, 250, 300, 400, 500 Ruler Scale, (20499) Product Type: RulerOwnMy OwnMy 30CM Solid Aluminum Metric Triangular Architect Scale Ruler Set, Architectural and Engineer Scale Ruler Set Profes Each package included 1 x black Big Scale Architect scale ruler, 1 x black Small Scale Architect scale ruler, 1 x blackWADY WADY 4 Pcs Metal Ruler, Triangular Scale Ruler Set, Metal Protractor, Aluminum Ruler, School Office Supplies, Precision High-Quality Materials: This drafting ruler set is made of aluminum alloy with a nice durability and resistance, which iDihan DIHAN #3530 Metric 30cm Architect Scale Ruler, Triangular Scale, Scale Ruler for Blueprint, Triangle Ruler, Drafting Rul DIHAN #3530 Metric 30cm Architect Scale Ruler, Triangular Scale, Scale Ruler for Blueprint, Triangle Ruler, Drafting RulTenuevo Scale Ruler Architect, 30cm Triangular Scale Rulers Metal Metric Ruler for Architects Engineers, 1:20, 1:25, 1:50, 1:75, [PREMIUM QUALITY] This engineering triangle scale is made of anodized aluminum alloy, very solid and sturdy. 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