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"Lose your head with Hipshot's NEW Headless System for bass guitar! Features fully adjustable saddles, lightweight aluminum bridge, dual string option(you may choose to use standard or double ball bass strings) and all the quality that you have come to expect from Hipshot. All mounting and adjusting hardware included. Available in 4,5,6,7,8, and 9 string models. Offered in a wide variety of string spacings. Chrome, Black and Gold finish."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.bestbassgear.com/hipshot-headless-system-4-string-bass-bridge-black-656-16-5mmspacing.htm>