300mm Rulex metal triangular scale ruler, silver, coloured grooves. Metric A scales. - Rulex
30cm Color Coded Side Triangular Metric Scale Ruler 1:100/200/250/300/400/500 | eBay
300mm flat oval scale ruler BLACK - scalerulers.co.uk
Triangular Architect Scale Ruler Color Coded Grooves Architectural Scale 1:100 1:200 1:250 1:300 1:400 1:500 For Architects Engineers and Draftsmans: Buy Online at Best Prices in Pakistan | Daraz.pk