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34x18 silver push fit smooth surface aluminum knob cap for potentiometers

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50x18 black full aluminum vertical knurling aluminum control knob for amplifiers

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48x23 black full aluminum vertical knurling aluminum control knob for speakers

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34x18 red push on smooth surface aluminum amplifier knob

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43x23 silver lock set smooth surface aluminum control knob for amplifiers

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38x25 black lock set crosswire aluminum control knob for speakers