The most widely used cable with a 2.1mm straight and a 2.1 mm right
angle connector 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.
Either the straight
or right angle connector can be plugged into the pedal.
This cable is 6″