Staedtler 961803AS Academy Oval Scale Ruler 30cm 961803ASSTD-961803ASStaedtler 961 Academy Scale Ruler ( AS 1212-3 METRIC )Staedtler Reference : 961 80-3 ASScale (Front )1:1 1:100 1:20 1:200 Scale (Back )1:25 1:2501:501:500
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