DiMarzio Black Angel Acoustic Soundhole Pickup<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> "For acoustic guitars with 3-1/2"" (89 mm) or larger soundhole using bronze or steel strings Wiring: 1 Conductor Magnet: Rare earth DC Resistance: 1.66 kOhm Top Dimensions: 4.26"" x 1.06"" Bottom Width: 3.4""" </span></li><li><span class="a-list-item"> Wiring: 1 Conductor </span></li><li><span class="a-list-item"> Magnet: Rare earth </span></li><li><span class="a-list-item"> DC Resistance: 1.66 kOhm </span></li><li><span class="a-list-item"> "Top Dimensions: 4.26"" x 1.6"" " </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41p3x15yAqL.jpg" noproxy>