Neewer&reg; Ultra Gentle Microfiber Cleaning Cloth String Cleaner for Guitar Bass Ukulele Mandolin Violin and Other String Instruments Designed for clean string instruments which with 4-string or 5-string Easy to use,and can extends the life of strings in use and preserves the tone of instruments strings Perfect for string instruments such as guitar bass ukulele mandolin voilin Revolutionary design provides unprecedented 360 degree string cleaning action The microfiber cloth on the microfiber pads are replaceable and cleanable