Coated strings don't have to sound dull and lifeless. GHS Infinity Bronze strings produce a vibrant, powerful, and brilliant tone. One reason for this is that the 80/20 bronze wire is coated before being wound onto the hexagonal core. These strings are made without Teflon or PFAS and are completely RoHS/Pb compliant. This means they meet EU requirements for safe and environmentally conscious products. Type: Roundwound Material: Coated Silver Plated Copper Gauge: 012/016/024/032/042/054.