Check the listing for details. String Action Gauge Ruler, Upgraded Guitar String Height Gauge with Inch & Metri. Color: Silver (Print), Condition: New. Listed at 8.48 USD. Rounded edges prevent scratches while ensuring safe handling in any luthier toolkit or personal setup case. 【Easy-to-Read, Long-Lasting Markings】Choose from Printed Silver or Etched Black versions—both feature high-contrast markings that resist fading.