This item is made of durable material for long-lasting and practical use. It is easy to use and designed for reliable performance. The precise design ensures functionality and effectiveness. After use, the strings will become smooth and polished. It is a cleaning tool suitable for guitar players and those who play stringed instruments. Feature - Color: As shown - Material: Plastic - Size: Approx. 13 x 3.1 x 2 cm / 5.1 x 1.2 x 0.8 inch (L x W x H) - Made of plastic, durable and resistant to damage - Lightweight for easy storage and portability - Helps remove rust from strings and can apply lubricating oil - Suitable for guitar, cello, violin, zither, piano, and other stringed instruments Packing list: 1 x Guitar Accessories Strings Derusting Pen, Strings Anti Rust Pen, Guitar String Care Oil Eraser