#D'Addario #Classical Guitar Strings Purchased from Soundhouse. These are for spares, but I'm selling them because I've decided on a different type of strings. D'Addario Extended Life Classical Guitar Strings These strings combine the low strings from the XT series, which feature D'ADDARIO's longest-lasting strings ever, achieved by applying a unique coating to composite strings known for their high tuning stability, with the PRO-ARTE high strings, renowned for their accurate intonation. They offer a long lifespan while providing a feel similar to non-coated strings, along with strength and pitch stability. - Brand: D'Addario - Model: XTC46 - Type: Classical Guitar Strings - Gauge: 29, 33, 41, 29w, 36w, 46w Thank you for looking.