5Pcs Ribbed Grip 4mm Split Shaft Potentiometer Control Knobs HRS 
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<br />Specification
<br />Products and quantity   5PCSX Potentiometer Knob 
<br />Knob Top Diameter    12mm / 0.7"
<br />Knob Base Diameter   16mm / 1"
<br />Knob Total Height   16mm / 0.8"
<br />Shaft Insert Diameter   4mm / 15/64"
<br />Material    Plastic, Metal