Augustine spectra electric strings are light nickel-plated strings featuring cultivation and completion of the famous Segovia sound. Choose from extra-light (.009-.042), light (.010-.046), medium (.011-.048) and heavy (.012-.054). The extra light set features: · E1 - .009 inch. - 0.228mm · B2 - .011 inch. - 0.279mm · G3 - .016 inch. - 0.406mm · D4 - .024 inch. - 0.609mm · A5 - .032 inch. - 0.812mm · E6 - .042 inch. - 1.066mm.