Materials: The Guitar String Cleaner is made of durable microfiber material, can be washed and reused, effectively cleans without damaging your instrument. Essential & Crucial: This Double-sided Cleaner can keep guitar strings clean and extend their life while maintaining the original tone of the guitar strings. Lightweight and Portable: Clean your guitar strings anytime and anywhere with this handy and portable guitar string cleaner. the size is 10.3 x 6 cm / 4 x 3.3 inches, It can be easily stored in your guitar bag for easy storage. Easy to Use: The guitar string cleaner is extremely easy to use. Just slide it under the strings, close it and press it on the keyboard. Wide Compatibility: String Cleaner is suitable for acoustic guitars, basses, electric guitars, strings and ukuleles. It is a versatile tool that makes a perfect gift for musicians who value the cleanliness of their instrument.