Isomars Metric Scale Ruler – Oval White plastic 4 Side Bevel Both side marking Ratio: 1:10, 1:20, 1:50, 1:100, 1:1, 1:2, 1:2:5, 1:5 Size: 300 x 40 x 2.7mm Categories: Drafting, Rulers Share This Email Products in this RangeSM12Isomars Metric Scale Ruler – Oval Explore more products Read more Isomars Circular Protractor Read more Isomars Drawing Boards – Plain Read more Isomars Circle Templates Read more Isomars Technical Drawing Board A2 (Model B) Read more Isomars Drawing Board Clips Set 4 Pcs