Be sure to add me to your favorites list Harmonic Bar Knob Button Part for the Roland V-Combo VR-09 Organ Electronic Keyboard. This is an original, genuine replacement part for some Roland organs, a harmonic bar knob. This is for the Roland V Combo model VR-09 electronic keyboard / organ, but there may be other models that take it as well (possibly the VR-730 and maybe others). I had a few black knobs available, but now I'm down to my last one, and I have run out of the white ones at this time. Genuine ROLAND part, in new, just out of package condition! Price is for one knob, and you can get more than one if you needed it. Thanks for looking! Check out my Store!