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Ultimate Music Theory UMT Ruler
![UMT Ruler](http://cdn.long-mcquade.com/files/68041/lg_82ee6c3e2733499ae7bf49f1a30cfe6c.png)
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This innovative Keyboard/Circle of Fifths Ruler is as Perfect as a Perfect 5th!
- CONVENIENT - Clips inside the workbook and works as a bookmark
- EXCLUSIVE - Clear plastic design, keyboard and the Circle of Fifths
- MUST HAVE - UMT Ruler (8 x 2) for straight bar lines, note stems, ledger lines and more!
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