The control knobs is designed for Gibson LP electric guitar, 6mm inner dimension, it can be used for other guitar with suitable size. It helps to adjust the tone and volume fast and conveniently. Features: Speed, volume, tone control knobs for Gibson LP electric guitar. Apply to approx. 6mm split shaft. 26.2mm max. dimension, 12.2mm height. 4pcs in one package, with 10 scales. Made of high quality plastic, durable and stylish. Specifications: Material: Plastic Color: White Quantity: 4pcs Item Size: 2.6 * 1.2 * 1.2cm / 1.0 * 0.5 * 0.5in Item Weight: 19g / 0.7oz Package Size: 5 * 5 * 1.2cm / 2.0 * 2.0 * 0.5in Package Weight: 20g / 0.7oz Package List: 4 * Knob Note: The item only includes the 4 control knobs.