Rulex 15cm 6 inch Flat Oval Metric Engineers Scale Ruler 1:10 1:100 1:5 1:50/1:20 1:200 1:500 1:1000 - UK manufactured

Rulex 15cm 6 inch Flat Oval Metric Engineers Scale Ruler 1:10 1:100 1:5 1:50/1:20 1:200 1:500 1:1000 - UK manufactured

Architectural Scale Ruler, Aluminum Triangular Scale Ruler Metric 1:20, 1:25, 1:50, 1:75, 1:100, 1:125 Standard 12 Inch for Architects, Students, Draftsman and Engineers-Black

Rulex Verulam 30cm 12 inch Flat Oval Metric Scale Ruler RIBA Approved No. 3 Scales: 1:1 1:100 1:5 1:50/1:20 1:200 1:1250 1:2500