Archtop Guitar Bridge German Made Ebony Self Adjusting Self adjusting base for archtop guitars. No more sanding! Unslotted crown leaves a lot of flexibility for string spacing and slot depth Quality carved ebony construction Nickel adjuster wheels Height 1" to 1 1/4" (25.4mm to 31.75mm); Base width 5 3/8" (136.5mm); String spacing max. 2 3/8" (60.3mm); String Spacing Min. 1 3/4" (44.45mm); Post to post 3" (76.2mm)