Features: [Guitar Knob Protector]: Our guitar knob protector is designed to protect your guitar knobs from dust, sweat, and finger salt erosion. It helps to delay oxidation and prolong the life of your guitar knobs, ensuring that your instrument stays in top condition for longer. [Learning Aid]: This product also serves as a learning aid for guitar players. It helps you to familiarize yourself with the names of the notes and the sequence of the strings, making it easier for you to learn and play the guitar. [High-Quality Material]: Made of silicone material, this guitar knob protector is not only durable but also aesthetically pleasing. Its minimalist design adds a touch of elegance to your guitar without compromising its functionality. [Versatile Design]: Our guitar knob protector comes in three different shapes - T-shape, umbrella shape, and D-shape, making it suitable for different types of guitars. The T-shape is suitable for folk and electric guitars, the umbrella shape is suitable for slant head electric guitars, and the D-shape is suitable for folk guitars. [Improve Learning Efficiency]: By helping you to quickly familiarize yourself with the guitar, this product can significantly improve your guitar learning efficiency. Whether you re a beginner or an experienced player, this guitar knob protector can help you to master your instrument faster. Specifications: Product Material: Silicone Product Color: White Product Quantity: 6Pcs Product Styles: D-Type, T-Type, Umbrella Type 20mm, Umbrella Type 23mm (optional) Applicable Guitar: D-Type suitable for folk guitar T-Type suitable for folk/electric guitar Umbrella Type is suitable for slanted electric guitars Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-2cm measuring deviation due to manual measurement. Package List: 6 * Protective Sleeve