2.1mm Straight Barrel Cable The most widely used cable with 2.1mm straight barrel connector on each end and standard (center negative) polarity. Used with a majority of popular pedal brands including Boss, MXR/Dunlop, TC Electronic Nova, Line 6 ToneCore, Ibanez and more. Power Supply Connector:2.1mm Straight Barrel PlugPedal Connector:2.1mm Straight Barrel PlugPolarity:Standard (Center Negative)Length:18 in / 46 cmPart# PPBARPrice: $3.99