Draftex Scale Ruler 30cm 1:1-5-10-100-20-200-50-500 Blue (Replcaes 124760)

SRM6230 in Ratios 1:1, 5, 10, 100, 20, 200, 50, 500

Manufactured of a tough ABS Plastic printed with 2 sets of graduations on each edge making 8 scales in all.
The profile of the rule is described as being oval but this is really to state the difference between these and flat scale rules. Flat scale rules have virtually gone from the market as they were only printed on one side - the other being the flat underside.