The Taylor ES 10mA Ground Fuse features two trimmed fuses to use within the fused string ground for Taylors Expression System electronics. This fuse is designed to blow in the event of improper electrical ground ensuring you are protected for any electrical discharge. If the fuse does blow the guitars electronics will continue to work but electrical hum is more likely to occur. These 10ma Replacement Fuses are compatible with all Taylor fused string grounds as well as the universal string grounds too.