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 & SilverMaterial: AcrylicInner diameter: 6mm / 0.24inPackage size: 10 * 8 * 2cm / 3.9 * 3.1 * 0.8inPackage weight: 15g / 0.5ozPackage including:2 * Volume control knob2 * Tone control knobs