D'Addario EXP17 Coated Phosphor Bronze Acoustic Guitar Strings, Medium, 13-56

The most popular of D'Addario's acoustic guitar strings is the phosphor bronze roundwound. Slightly softer than 80/20 bronze, these roundwound strings deliver a warm, bright, balanced acoustic tone. Made from corrosion-resistant metal wrapped around a hexagonal steel core, these strings will impress you with their longevity and superior tonal characteristics. D'Addario was the first to create these strings in 1974, and their reputation has grown and continues to this day. D'Addario's EXP series features a patented coating that helps the strings last longer. A polymer layer is applied to the strings BEFORE they are wrapped around the steel core, giving them the same beautiful tone and feel as uncoated strings, but with up to four times the life.