Rolson 50820 300mm Triangle Scale Ruler

Rolson-Metal-Ruler-30cm-12inch-Rolson-50820-p-A-300mm-sturdy-triangular-aluminium-rule-with-separate-metric-graduations-on-every-side-p-Rolson-50820-300mm-Triangle-Scale-Ruler

Price: 3.25 from Rapid Online Rapid Electronics Ltd.