Photo 1 of Helix - 2-in-1 Ruler - Integrated Circle Templates - Innovative Learning Tool - 12 Inch / 30cm (36001)

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Photo 1 of Helix - 2-in-1 Ruler - Integrated Circle Templates - Innovative Learning Tool - 12 Inch / 30cm (36001)Photo 2 of Helix - 2-in-1 Ruler - Integrated Circle Templates - Innovative Learning Tool - 12 Inch / 30cm (36001)