Thank you for viewing. These are 85/15 Bronze acoustic guitar strings. I purchased these unopened from a used goods store, but I haven't had a chance to use them. I've also recently bought a new acoustic guitar, so I'm putting these up for sale. Immediate purchase is OK. - Brand: D'Addario - Model: EZ920 - Gauge: Medium Light (012-054) - Material: 85/15 Bronze - Features: Corrosion barrier sleeve - Tone: Full, Bright Tone Although unopened, please understand that there are traces of price tag removal on the package and that they have been stored at home. Please only purchase if you are comfortable with this.