Black Stacked Dual Control Audio Knob Concentric Set 3mm
Black Stacked Dual Control Knob Concentric Set with set screw.
Side-screw requires an allen wrench to adjust (allen wrench not included)
Top quality, made in Korea
Great for amps, synthesizers and other audio equipment that uses concentric knobs.
The top concentric knob has a 3mm/.11" mounting hole
The bottom concentric knob has a 6.4mm/.25" mounting hole