From Martin: The Darco line of acoustic strings promises quality, tone, and value in every pack. They are designed for the pros and priced for the working musician so every guitar player can afford to change their strings as often as needed to keep their guitar sounding new all the time. If you take away the bells and whistles, the magic coatings, the chrome-plated alloys and all the markups that make strings cost more, what really makes a great guitar string is superb tone, strength, clarity, and reliability. Darco strings deliver all of this and more at an unbeatable value. Darco acoustic strings are offered in 80/20 Bronze and 92/8 Phosphor Bronze. Both are meticulously constructed using a tin-plated steel core wire and high quality wrap wire. They will be available in a variety of gauges to suit every player. Darco offers guitar players that pre-gig-peace-of-mind or heading-to-the-studio fresh set string change. Play more. Pay Less.