Great for removing dirt and corrosion while preventing strings from oxidizing and rusting. Makes strings last longer; provides enough lubrication to old strings to make them look like new again and helps eliminate unwanted string noise.The Ultimate Guitar String Cleaner Featuring a dual end design, one end is used to clean your guitar strings and the other end provides lubricant to ensure your guitar strings are ready while preventing rust Great for guitar, cello, violin, zither, piano and other stringed instruments Perfect double-ended design: one end is rust-removing felt for quick and easy cleaning of strings; the other end is lubricating felt for guitar string maintenance and guitar string polishing.Portable and Small: The product size is 0.79 x 1.3 x 5.12 inches (2 x 13 x 3.3cm), easy to carry and use It's more convenient and easier to use than carrying a lot of messy lube and a separate rope cleaner.High Wear-resistant and excellent durability.color:As shownMaterial:composite materialPackage Contents:5 x guitar toolsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.