Medium Tension</br>Bio Nylon Treble Strings</br>Silver Wrapped Nylgut Basses</br></br>Product Description</br></br>New in Package Features: Aquila Strings Made in Italy Classical guitar strings Chitarra Classica BioNylon/Silverplated Medium guage Model: 37C</br><br/>http://www.amazon.com/gp/product/B005JIIR8A