Product Description Product Specs/Additional Information Related Videos Audio Product Description Original factory replacement control knob for Ernie Ball Music Man Bongo.Knob for Bongo bass controls. Choose for EQ knobs on two-pickup models or for volume and balance knobs, as well as EQ knobs for one-pickup models.Use “Non-stacked” for volume and balance knobs, as well as EQ knobs for one-pickup models. Knob for Bongo bass controls. Product Specs/Additional Information Related Videos Audio