Twopiece set of black knurled aluminum rotary potentiometer knob caps, 4 cm diameter each, designed for audio equipment and musical instruments. Key benefits Improved control: 4 cm diameter gives a comfortable surface for precise volume and tone adjustments. Better grip: knurled texture reduces slippage during performance or studio work. Durable and lightweight: machined aluminum construction resists wear while keeping added mass minimal. Easy upgrade or replacement: two matching knobs included for stereo controls or spare use. Function and attributes Function: rotary knob caps for potentiometers used to adjust levels and settings on audio gear. Material: knurled aluminum for a tactile feel and longlasting finish. Size: 4 cm diameter per knob, sized for comfortable fingertip operation. Finish: black color for a clean, professional appearance that complements most equipment. Performance: stable on the shaft for consistent adjustments and reliable onstage or in the studio. Compatibility Intended for use with rotary potentiometers commonly found on guitars, amplifiers, mixers, and other audio devices. Ideal when replacing worn or missing knobs or when standardizing control appearance across gear. Practical applications a stripped or damaged knob on an electric guitar to restore playability and appearance. Upgrade amplifier or pedal controls to improve grip and accuracy during live performance. Use in DIY audio projects and console repairs to achieve a consistent look and reliable control. Package contents 2 black knurled aluminum rotary potentiometer knob caps, 4 cm diameter each.