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Guitar String Action Gauge Height Ruler Electric Acoustic Guitar Double-sided Action Gauge Ruler Measuring Tools
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Amazon.com: Alomejor 2Pcs String Action Gauge Ruler Guitar Bass Plastic Double Sided Guide Luthier Measuring Tool for Guitar Bass : Musical Instruments
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Understanding the Perils of High Action on Stringed Instruments and 3 Ways to Recognize it | Strings Magazine
![Seven String Bass Viol. Culture: French. Dimensions: Height: 51 15/16 in. (132 cm) Width: 16 1/8 in. (41 cm) Depth: 9 13/16 in. (25 cm). Maker: Nicolas Bertrand (1686-1735). Date: 1720. This Seven String Bass Viol. Culture: French. Dimensions: Height: 51 15/16 in. (132 cm) Width: 16 1/8 in. (41 cm) Depth: 9 13/16 in. (25 cm). Maker: Nicolas Bertrand (1686-1735). Date: 1720. This](https://c8.alamy.com/comp/PAPJ5W/seven-string-bass-viol-culture-french-dimensions-height-51-1516-in-132-cm-width-16-18-in-41-cm-depth-9-1316-in-25-cm-maker-nicolas-bertrand-1686-1735-date-1720-this-instrument-retains-its-original-neck-which-was-reshaped-when-the-viol-was-converted-to-a-cello-probably-in-the-late-eighteenth-or-nineteenth-century-bass-viols-of-french-origin-feature-seven-strings-an-invention-of-the-french-viol-player-jean-de-sainte-colombe-fl-1658-87-died-by-1701-nicolas-bertrand-one-of-the-most-celebrated-makers-of-viols-incorporated-this-feature-in-his-bass-viols-museu-PAPJ5W.jpg)