Rotary knob, black with gold face, Roland. This replacement D-shaft knob is Roland part numbers 22470119 and 04344212.
This item is NEW.
There is only 1 of this item left in stock.
$16.95
(Part # 7372)
Click on photo to enlarge
If you're not sure whether this item is compatible with your instrument, select the brand and model here to check.