Five ply PVC, printed two sides with white graphics. Metric side with 1cm square with 5cm blocks, 1mm calibrated X-Y axis, 30°, 45° and 60°angle guide. Imperial measurements on reverse side with half inch squares within 1 inch blocks, co-ordinate axis calibrated in eighths: 30°, 45° and 60°angle guide, Pica and Point lettering guides.
