Features: 4 pcs of black speed knobs with silver top. Includes 2 Volume knobs and 2 Tone knobs. The central hole for Pots is approx. 6mm in diameter. High quality Acrylic material. Vintage and classical style. Specifications: Color: Black !#!amp!*! Silver Material: Acrylic Inner diameter: 6mm / 0.24in Package size: 10 * 8 * 2cm / 3.9 * 3.1 * 0.8in Package weight: 15g / 0.5oz Package including: 2 * Volume control knob 2 * Tone control knobs