Specifications ■ Coating strings for acoustic guitar ■ EXP ACOUSTIC ■ Phosphor Bronze ■ Custom Light ■ .011, .015, .022, .032, .042, .052 ～D'Addario EXP ACOUSTIC～ The EXP ACOUSTIC series features a coating on phosphor bronze / 80/20 bronze strings. With a coating 50% thinner than conventional ones, these coated acoustic guitar strings offer a natural string touch and the bright tone unique to phosphor bronze / 80/20 bronze, while also achieving a long lifespan.